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-rw-r--r--libqpdf/Pl_ASCIIHexDecoder.cc2
1 files changed, 1 insertions, 1 deletions
diff --git a/libqpdf/Pl_ASCIIHexDecoder.cc b/libqpdf/Pl_ASCIIHexDecoder.cc
index 48836f58..5590efba 100644
--- a/libqpdf/Pl_ASCIIHexDecoder.cc
+++ b/libqpdf/Pl_ASCIIHexDecoder.cc
@@ -1,7 +1,7 @@
#include <qpdf/Pl_ASCIIHexDecoder.hh>
#include <qpdf/QTC.hh>
-#include <ctype.h>
+#include <cctype>
#include <stdexcept>
Pl_ASCIIHexDecoder::Pl_ASCIIHexDecoder(char const* identifier, Pipeline* next) :