Protect headers with compliant identifiers (fixes #233)

31 files changed, 91 insertions, 91 deletions

diff --git a/libqpdf/qpdf/BitStream.hh b/libqpdf/qpdf/BitStream.hh
index 8ea8bec4..bdbf2645 100644
--- a/libqpdf/qpdf/BitStream.hh
+++ b/libqpdf/qpdf/BitStream.hh
@@ -1,7 +1,7 @@
 // Read bits from a bit stream.  See BitWriter for writing.
 
-#ifndef __BITSTREAM_HH__
-#define __BITSTREAM_HH__
+#ifndef BITSTREAM_HH
+#define BITSTREAM_HH
 
 #include <qpdf/DLL.h>
 
@@ -28,4 +28,4 @@ class BitStream
     unsigned int bits_available;
 };
 
-#endif // __BITSTREAM_HH__
+#endif // BITSTREAM_HH
diff --git a/libqpdf/qpdf/BitWriter.hh b/libqpdf/qpdf/BitWriter.hh
index 3d93c0b7..76e28b8e 100644
--- a/libqpdf/qpdf/BitWriter.hh
+++ b/libqpdf/qpdf/BitWriter.hh
@@ -1,7 +1,7 @@
 // Write bits into a bit stream.  See BitStream for reading.
 
-#ifndef __BITWRITER_HH__
-#define __BITWRITER_HH__
+#ifndef BITWRITER_HH
+#define BITWRITER_HH
 
 #include <qpdf/DLL.h>
 
@@ -28,4 +28,4 @@ class BitWriter
     unsigned int bit_offset;
 };
 
-#endif // __BITWRITER_HH__
+#endif // BITWRITER_HH
diff --git a/libqpdf/qpdf/ContentNormalizer.hh b/libqpdf/qpdf/ContentNormalizer.hh
index 0d505a37..4d976d27 100644
--- a/libqpdf/qpdf/ContentNormalizer.hh
+++ b/libqpdf/qpdf/ContentNormalizer.hh
@@ -1,5 +1,5 @@
-#ifndef __CONTENTNORMALIZER_HH__
-#define __CONTENTNORMALIZER_HH__
+#ifndef CONTENTNORMALIZER_HH
+#define CONTENTNORMALIZER_HH
 
 #include <qpdf/QPDFObjectHandle.hh>
 
@@ -18,4 +18,4 @@ class ContentNormalizer: public QPDFObjectHandle::TokenFilter
     bool last_token_was_bad;
 };
 
-#endif // __CONTENTNORMALIZER_HH__
+#endif // CONTENTNORMALIZER_HH
diff --git a/libqpdf/qpdf/InsecureRandomDataProvider.hh b/libqpdf/qpdf/InsecureRandomDataProvider.hh
index 530ee3cb..76f2703a 100644
--- a/libqpdf/qpdf/InsecureRandomDataProvider.hh
+++ b/libqpdf/qpdf/InsecureRandomDataProvider.hh
@@ -1,5 +1,5 @@
-#ifndef __INSECURERANDOMDATAPROVIDER_HH__
-#define __INSECURERANDOMDATAPROVIDER_HH__
+#ifndef INSECURERANDOMDATAPROVIDER_HH
+#define INSECURERANDOMDATAPROVIDER_HH
 
 #include <qpdf/RandomDataProvider.hh>
 #include <qpdf/DLL.h>
@@ -24,4 +24,4 @@ class InsecureRandomDataProvider: public RandomDataProvider
     bool seeded_random;
 };
 
-#endif // __INSECURERANDOMDATAPROVIDER_HH__
+#endif // INSECURERANDOMDATAPROVIDER_HH
diff --git a/libqpdf/qpdf/MD5.hh b/libqpdf/qpdf/MD5.hh
index 4cfe027e..5cefe08c 100644
--- a/libqpdf/qpdf/MD5.hh
+++ b/libqpdf/qpdf/MD5.hh
@@ -1,5 +1,5 @@
-#ifndef __MD5_HH__
-#define __MD5_HH__
+#ifndef MD5_HH
+#define MD5_HH
 
 #include <qpdf/DLL.h>
 #include <qpdf/qpdf-config.h>
@@ -89,4 +89,4 @@ class MD5
     Digest digest_val;
 };
 
-#endif // __MD5_HH__
+#endif // MD5_HH
diff --git a/libqpdf/qpdf/OffsetInputSource.hh b/libqpdf/qpdf/OffsetInputSource.hh
index aedc574a..d541db1a 100644
--- a/libqpdf/qpdf/OffsetInputSource.hh
+++ b/libqpdf/qpdf/OffsetInputSource.hh
@@ -1,5 +1,5 @@
-#ifndef __QPDF_OFFSETINPUTSOURCE_HH__
-#define __QPDF_OFFSETINPUTSOURCE_HH__
+#ifndef QPDF_OFFSETINPUTSOURCE_HH
+#define QPDF_OFFSETINPUTSOURCE_HH
 
 // This class implements an InputSource that proxies for an underlying
 // input source but offset a specific number of bytes.
@@ -26,4 +26,4 @@ class OffsetInputSource: public InputSource
     qpdf_offset_t global_offset;
 };
 
-#endif // __QPDF_OFFSETINPUTSOURCE_HH__
+#endif // QPDF_OFFSETINPUTSOURCE_HH
diff --git a/libqpdf/qpdf/Pl_AES_PDF.hh b/libqpdf/qpdf/Pl_AES_PDF.hh
index 9aa73ad6..ac56e59a 100644
--- a/libqpdf/qpdf/Pl_AES_PDF.hh
+++ b/libqpdf/qpdf/Pl_AES_PDF.hh
@@ -1,5 +1,5 @@
-#ifndef __PL_AES_PDF_HH__
-#define __PL_AES_PDF_HH__
+#ifndef PL_AES_PDF_HH
+#define PL_AES_PDF_HH
 
 #include <qpdf/Pipeline.hh>
 #include <qpdf/qpdf-config.h>
@@ -66,4 +66,4 @@ class Pl_AES_PDF: public Pipeline
     bool disable_padding;
 };
 
-#endif // __PL_AES_PDF_HH__
+#endif // PL_AES_PDF_HH
diff --git a/libqpdf/qpdf/Pl_ASCII85Decoder.hh b/libqpdf/qpdf/Pl_ASCII85Decoder.hh
index 001da867..4778f61a 100644
--- a/libqpdf/qpdf/Pl_ASCII85Decoder.hh
+++ b/libqpdf/qpdf/Pl_ASCII85Decoder.hh
@@ -1,5 +1,5 @@
-#ifndef __PL_ASCII85DECODER_HH__
-#define __PL_ASCII85DECODER_HH__
+#ifndef PL_ASCII85DECODER_HH
+#define PL_ASCII85DECODER_HH
 
 #include <qpdf/Pipeline.hh>
 
@@ -23,4 +23,4 @@ class Pl_ASCII85Decoder: public Pipeline
     size_t eod;
 };
 
-#endif // __PL_ASCII85DECODER_HH__
+#endif // PL_ASCII85DECODER_HH
diff --git a/libqpdf/qpdf/Pl_ASCIIHexDecoder.hh b/libqpdf/qpdf/Pl_ASCIIHexDecoder.hh
index 1d33afde..766fd727 100644
--- a/libqpdf/qpdf/Pl_ASCIIHexDecoder.hh
+++ b/libqpdf/qpdf/Pl_ASCIIHexDecoder.hh
@@ -1,5 +1,5 @@
-#ifndef __PL_ASCIIHEXDECODER_HH__
-#define __PL_ASCIIHEXDECODER_HH__
+#ifndef PL_ASCIIHEXDECODER_HH
+#define PL_ASCIIHEXDECODER_HH
 
 #include <qpdf/Pipeline.hh>
 
@@ -23,4 +23,4 @@ class Pl_ASCIIHexDecoder: public Pipeline
     bool eod;
 };
 
-#endif // __PL_ASCIIHEXDECODER_HH__
+#endif // PL_ASCIIHEXDECODER_HH
diff --git a/libqpdf/qpdf/Pl_LZWDecoder.hh b/libqpdf/qpdf/Pl_LZWDecoder.hh
index 4121f6f2..b4f517ff 100644
--- a/libqpdf/qpdf/Pl_LZWDecoder.hh
+++ b/libqpdf/qpdf/Pl_LZWDecoder.hh
@@ -1,5 +1,5 @@
-#ifndef __PL_LZWDECODER_HH__
-#define __PL_LZWDECODER_HH__
+#ifndef PL_LZWDECODER_HH
+#define PL_LZWDECODER_HH
 
 #include <qpdf/Pipeline.hh>
 
@@ -40,4 +40,4 @@ class Pl_LZWDecoder: public Pipeline
     int last_code;
 };
 
-#endif // __PL_LZWDECODER_HH__
+#endif // PL_LZWDECODER_HH
diff --git a/libqpdf/qpdf/Pl_MD5.hh b/libqpdf/qpdf/Pl_MD5.hh
index c23e6b45..08a93706 100644
--- a/libqpdf/qpdf/Pl_MD5.hh
+++ b/libqpdf/qpdf/Pl_MD5.hh
@@ -1,5 +1,5 @@
-#ifndef __PL_MD5_HH__
-#define __PL_MD5_HH__
+#ifndef PL_MD5_HH
+#define PL_MD5_HH
 
 // This pipeline sends its output to its successor unmodified.  After
 // calling finish, the MD5 checksum of the data that passed through
@@ -45,4 +45,4 @@ class Pl_MD5: public Pipeline
     bool persist_across_finish;
 };
 
-#endif // __PL_MD5_HH__
+#endif // PL_MD5_HH
diff --git a/libqpdf/qpdf/Pl_PNGFilter.hh b/libqpdf/qpdf/Pl_PNGFilter.hh
index f167c67c..f6745319 100644
--- a/libqpdf/qpdf/Pl_PNGFilter.hh
+++ b/libqpdf/qpdf/Pl_PNGFilter.hh
@@ -1,5 +1,5 @@
-#ifndef __PL_PNGFILTER_HH__
-#define __PL_PNGFILTER_HH__
+#ifndef PL_PNGFILTER_HH
+#define PL_PNGFILTER_HH
 
 // This pipeline applies or reverses the application of a PNG filter
 // as described in the PNG specification.
@@ -49,4 +49,4 @@ class Pl_PNGFilter: public Pipeline
     size_t incoming;
 };
 
-#endif // __PL_PNGFILTER_HH__
+#endif // PL_PNGFILTER_HH
diff --git a/libqpdf/qpdf/Pl_RC4.hh b/libqpdf/qpdf/Pl_RC4.hh
index bb892f12..27eab5d0 100644
--- a/libqpdf/qpdf/Pl_RC4.hh
+++ b/libqpdf/qpdf/Pl_RC4.hh
@@ -1,5 +1,5 @@
-#ifndef __PL_RC4_HH__
-#define __PL_RC4_HH__
+#ifndef PL_RC4_HH
+#define PL_RC4_HH
 
 #include <qpdf/Pipeline.hh>
 
@@ -29,4 +29,4 @@ class Pl_RC4: public Pipeline
     RC4 rc4;
 };
 
-#endif // __PL_RC4_HH__
+#endif // PL_RC4_HH
diff --git a/libqpdf/qpdf/Pl_SHA2.hh b/libqpdf/qpdf/Pl_SHA2.hh
index 8ff4723a..0748dd0b 100644
--- a/libqpdf/qpdf/Pl_SHA2.hh
+++ b/libqpdf/qpdf/Pl_SHA2.hh
@@ -1,5 +1,5 @@
-#ifndef __PL_SHA2_HH__
-#define __PL_SHA2_HH__
+#ifndef PL_SHA2_HH
+#define PL_SHA2_HH
 
 // Bits must be a supported number of bits, currently only 256, 384,
 // or 512.  Passing 0 as bits leaves the pipeline uncommitted, in
@@ -47,4 +47,4 @@ class Pl_SHA2: public Pipeline
     unsigned char sha512sum[64];
 };
 
-#endif // __PL_SHA2_HH__
+#endif // PL_SHA2_HH
diff --git a/libqpdf/qpdf/Pl_TIFFPredictor.hh b/libqpdf/qpdf/Pl_TIFFPredictor.hh
index 235068ee..b4391f8e 100644
--- a/libqpdf/qpdf/Pl_TIFFPredictor.hh
+++ b/libqpdf/qpdf/Pl_TIFFPredictor.hh
@@ -1,5 +1,5 @@
-#ifndef __PL_TIFFPREDICTOR_HH__
-#define __PL_TIFFPREDICTOR_HH__
+#ifndef PL_TIFFPREDICTOR_HH
+#define PL_TIFFPREDICTOR_HH
 
 // This pipeline reverses the application of a TIFF predictor as
 // described in the TIFF specification.
@@ -36,4 +36,4 @@ class Pl_TIFFPredictor: public Pipeline
     size_t pos;
 };
 
-#endif // __PL_TIFFPREDICTOR_HH__
+#endif // PL_TIFFPREDICTOR_HH
diff --git a/libqpdf/qpdf/QPDF_Array.hh b/libqpdf/qpdf/QPDF_Array.hh
index 8a23da35..3681686f 100644
--- a/libqpdf/qpdf/QPDF_Array.hh
+++ b/libqpdf/qpdf/QPDF_Array.hh
@@ -1,5 +1,5 @@
-#ifndef __QPDF_ARRAY_HH__
-#define __QPDF_ARRAY_HH__
+#ifndef QPDF_ARRAY_HH
+#define QPDF_ARRAY_HH
 
 #include <qpdf/QPDFObject.hh>
 
@@ -33,4 +33,4 @@ class QPDF_Array: public QPDFObject
     std::vector<QPDFObjectHandle> items;
 };
 
-#endif // __QPDF_ARRAY_HH__
+#endif // QPDF_ARRAY_HH
diff --git a/libqpdf/qpdf/QPDF_Bool.hh b/libqpdf/qpdf/QPDF_Bool.hh
index 2ec8eb10..72b4a509 100644
--- a/libqpdf/qpdf/QPDF_Bool.hh
+++ b/libqpdf/qpdf/QPDF_Bool.hh
@@ -1,5 +1,5 @@
-#ifndef __QPDF_BOOL_HH__
-#define __QPDF_BOOL_HH__
+#ifndef QPDF_BOOL_HH
+#define QPDF_BOOL_HH
 
 #include <qpdf/QPDFObject.hh>
 
@@ -17,4 +17,4 @@ class QPDF_Bool: public QPDFObject
     bool val;
 };
 
-#endif // __QPDF_BOOL_HH__
+#endif // QPDF_BOOL_HH
diff --git a/libqpdf/qpdf/QPDF_Dictionary.hh b/libqpdf/qpdf/QPDF_Dictionary.hh
index cea63835..aa519fa5 100644
--- a/libqpdf/qpdf/QPDF_Dictionary.hh
+++ b/libqpdf/qpdf/QPDF_Dictionary.hh
@@ -1,5 +1,5 @@
-#ifndef __QPDF_DICTIONARY_HH__
-#define __QPDF_DICTIONARY_HH__
+#ifndef QPDF_DICTIONARY_HH
+#define QPDF_DICTIONARY_HH
 
 #include <qpdf/QPDFObject.hh>
 
@@ -40,4 +40,4 @@ class QPDF_Dictionary: public QPDFObject
     std::map<std::string, QPDFObjectHandle> items;
 };
 
-#endif // __QPDF_DICTIONARY_HH__
+#endif // QPDF_DICTIONARY_HH
diff --git a/libqpdf/qpdf/QPDF_InlineImage.hh b/libqpdf/qpdf/QPDF_InlineImage.hh
index 6be034a9..f3a9269f 100644
--- a/libqpdf/qpdf/QPDF_InlineImage.hh
+++ b/libqpdf/qpdf/QPDF_InlineImage.hh
@@ -1,5 +1,5 @@
-#ifndef __QPDF_INLINEIMAGE_HH__
-#define __QPDF_INLINEIMAGE_HH__
+#ifndef QPDF_INLINEIMAGE_HH
+#define QPDF_INLINEIMAGE_HH
 
 #include <qpdf/QPDFObject.hh>
 
@@ -17,4 +17,4 @@ class QPDF_InlineImage: public QPDFObject
     std::string val;
 };
 
-#endif // __QPDF_INLINEIMAGE_HH__
+#endif // QPDF_INLINEIMAGE_HH
diff --git a/libqpdf/qpdf/QPDF_Integer.hh b/libqpdf/qpdf/QPDF_Integer.hh
index 091392ab..b9459384 100644
--- a/libqpdf/qpdf/QPDF_Integer.hh
+++ b/libqpdf/qpdf/QPDF_Integer.hh
@@ -1,5 +1,5 @@
-#ifndef __QPDF_INTEGER_HH__
-#define __QPDF_INTEGER_HH__
+#ifndef QPDF_INTEGER_HH
+#define QPDF_INTEGER_HH
 
 #include <qpdf/QPDFObject.hh>
 
@@ -17,4 +17,4 @@ class QPDF_Integer: public QPDFObject
     long long val;
 };
 
-#endif // __QPDF_INTEGER_HH__
+#endif // QPDF_INTEGER_HH
diff --git a/libqpdf/qpdf/QPDF_Name.hh b/libqpdf/qpdf/QPDF_Name.hh
index 5f50c41d..2f240fe5 100644
--- a/libqpdf/qpdf/QPDF_Name.hh
+++ b/libqpdf/qpdf/QPDF_Name.hh
@@ -1,5 +1,5 @@
-#ifndef __QPDF_NAME_HH__
-#define __QPDF_NAME_HH__
+#ifndef QPDF_NAME_HH
+#define QPDF_NAME_HH
 
 #include <qpdf/QPDFObject.hh>
 
@@ -20,4 +20,4 @@ class QPDF_Name: public QPDFObject
     std::string name;
 };
 
-#endif // __QPDF_NAME_HH__
+#endif // QPDF_NAME_HH
diff --git a/libqpdf/qpdf/QPDF_Null.hh b/libqpdf/qpdf/QPDF_Null.hh
index 16ca4755..e55193c7 100644
--- a/libqpdf/qpdf/QPDF_Null.hh
+++ b/libqpdf/qpdf/QPDF_Null.hh
@@ -1,5 +1,5 @@
-#ifndef __QPDF_NULL_HH__
-#define __QPDF_NULL_HH__
+#ifndef QPDF_NULL_HH
+#define QPDF_NULL_HH
 
 #include <qpdf/QPDFObject.hh>
 
@@ -12,4 +12,4 @@ class QPDF_Null: public QPDFObject
     virtual char const* getTypeName() const;
 };
 
-#endif // __QPDF_NULL_HH__
+#endif // QPDF_NULL_HH
diff --git a/libqpdf/qpdf/QPDF_Operator.hh b/libqpdf/qpdf/QPDF_Operator.hh
index 9d18ad37..4bf40066 100644
--- a/libqpdf/qpdf/QPDF_Operator.hh
+++ b/libqpdf/qpdf/QPDF_Operator.hh
@@ -1,5 +1,5 @@
-#ifndef __QPDF_OPERATOR_HH__
-#define __QPDF_OPERATOR_HH__
+#ifndef QPDF_OPERATOR_HH
+#define QPDF_OPERATOR_HH
 
 #include <qpdf/QPDFObject.hh>
 
@@ -17,4 +17,4 @@ class QPDF_Operator: public QPDFObject
     std::string val;
 };
 
-#endif // __QPDF_OPERATOR_HH__
+#endif // QPDF_OPERATOR_HH
diff --git a/libqpdf/qpdf/QPDF_Real.hh b/libqpdf/qpdf/QPDF_Real.hh
index d59ed982..1a523dcf 100644
--- a/libqpdf/qpdf/QPDF_Real.hh
+++ b/libqpdf/qpdf/QPDF_Real.hh
@@ -1,5 +1,5 @@
-#ifndef __QPDF_REAL_HH__
-#define __QPDF_REAL_HH__
+#ifndef QPDF_REAL_HH
+#define QPDF_REAL_HH
 
 #include <qpdf/QPDFObject.hh>
 
@@ -19,4 +19,4 @@ class QPDF_Real: public QPDFObject
     std::string val;
 };
 
-#endif // __QPDF_REAL_HH__
+#endif // QPDF_REAL_HH
diff --git a/libqpdf/qpdf/QPDF_Reserved.hh b/libqpdf/qpdf/QPDF_Reserved.hh
index 8dbf4fe4..8062abb1 100644
--- a/libqpdf/qpdf/QPDF_Reserved.hh
+++ b/libqpdf/qpdf/QPDF_Reserved.hh
@@ -1,5 +1,5 @@
-#ifndef __QPDF_RESERVED_HH__
-#define __QPDF_RESERVED_HH__
+#ifndef QPDF_RESERVED_HH
+#define QPDF_RESERVED_HH
 
 #include <qpdf/QPDFObject.hh>
 
@@ -12,4 +12,4 @@ class QPDF_Reserved: public QPDFObject
     virtual char const* getTypeName() const;
 };
 
-#endif // __QPDF_RESERVED_HH__
+#endif // QPDF_RESERVED_HH
diff --git a/libqpdf/qpdf/QPDF_Stream.hh b/libqpdf/qpdf/QPDF_Stream.hh
index 98b8c11f..7af2ffc2 100644
--- a/libqpdf/qpdf/QPDF_Stream.hh
+++ b/libqpdf/qpdf/QPDF_Stream.hh
@@ -1,5 +1,5 @@
-#ifndef __QPDF_STREAM_HH__
-#define __QPDF_STREAM_HH__
+#ifndef QPDF_STREAM_HH
+#define QPDF_STREAM_HH
 
 #include <qpdf/Types.h>
 
@@ -82,4 +82,4 @@ class QPDF_Stream: public QPDFObject
         PointerHolder<QPDFObjectHandle::TokenFilter> > token_filters;
 };
 
-#endif // __QPDF_STREAM_HH__
+#endif // QPDF_STREAM_HH
diff --git a/libqpdf/qpdf/QPDF_String.hh b/libqpdf/qpdf/QPDF_String.hh
index b4858c49..377b0900 100644
--- a/libqpdf/qpdf/QPDF_String.hh
+++ b/libqpdf/qpdf/QPDF_String.hh
@@ -1,5 +1,5 @@
-#ifndef __QPDF_STRING_HH__
-#define __QPDF_STRING_HH__
+#ifndef QPDF_STRING_HH
+#define QPDF_STRING_HH
 
 #include <qpdf/QPDFObject.hh>
 
@@ -22,4 +22,4 @@ class QPDF_String: public QPDFObject
     std::string val;
 };
 
-#endif // __QPDF_STRING_HH__
+#endif // QPDF_STRING_HH
diff --git a/libqpdf/qpdf/RC4.hh b/libqpdf/qpdf/RC4.hh
index c26f3d0f..efd91069 100644
--- a/libqpdf/qpdf/RC4.hh
+++ b/libqpdf/qpdf/RC4.hh
@@ -1,5 +1,5 @@
-#ifndef __RC4_HH__
-#define __RC4_HH__
+#ifndef RC4_HH
+#define RC4_HH
 
 class RC4
 {
@@ -22,4 +22,4 @@ class RC4
     RC4Key key;
 };
 
-#endif // __RC4_HH__
+#endif // RC4_HH
diff --git a/libqpdf/qpdf/SecureRandomDataProvider.hh b/libqpdf/qpdf/SecureRandomDataProvider.hh
index 178c73c0..3f5ed19f 100644
--- a/libqpdf/qpdf/SecureRandomDataProvider.hh
+++ b/libqpdf/qpdf/SecureRandomDataProvider.hh
@@ -1,5 +1,5 @@
-#ifndef __SECURERANDOMDATAPROVIDER_HH__
-#define __SECURERANDOMDATAPROVIDER_HH__
+#ifndef SECURERANDOMDATAPROVIDER_HH
+#define SECURERANDOMDATAPROVIDER_HH
 
 #include <qpdf/RandomDataProvider.hh>
 #include <qpdf/DLL.h>
@@ -19,4 +19,4 @@ class SecureRandomDataProvider: public RandomDataProvider
     static RandomDataProvider* getInstance();
 };
 
-#endif // __SECURERANDOMDATAPROVIDER_HH__
+#endif // SECURERANDOMDATAPROVIDER_HH
diff --git a/libqpdf/sph/sph_sha2.h b/libqpdf/sph/sph_sha2.h
index 4bff9cd8..dde62088 100644
--- a/libqpdf/sph/sph_sha2.h
+++ b/libqpdf/sph/sph_sha2.h
@@ -37,8 +37,8 @@
  * @author   Thomas Pornin <thomas.pornin@cryptolog.com>
  */
 
-#ifndef SPH_SHA2_H__
-#define SPH_SHA2_H__
+#ifndef SPH_SHA2_H
+#define SPH_SHA2_H
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/libqpdf/sph/sph_types.h b/libqpdf/sph/sph_types.h
index eab09a26..f434d8bb 100644
--- a/libqpdf/sph/sph_types.h
+++ b/libqpdf/sph/sph_types.h
@@ -44,8 +44,8 @@
  * @author   Thomas Pornin <thomas.pornin@cryptolog.com>
  */
 
-#ifndef SPH_TYPES_H__
-#define SPH_TYPES_H__
+#ifndef SPH_TYPES_H
+#define SPH_TYPES_H
 
 #include <limits.h>