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-rw-r--r--libqpdf/bits_include.cc1
1 files changed, 1 insertions, 0 deletions
diff --git a/libqpdf/bits_include.cc b/libqpdf/bits_include.cc
index 14c4640d..0f52b4e7 100644
--- a/libqpdf/bits_include.cc
+++ b/libqpdf/bits_include.cc
@@ -1,3 +1,4 @@
+// This file is #included in other source files.
#ifndef __BITS_CC__
#define __BITS_CC__