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-rw-r--r--sdext/source/pdfimport/xpdfwrapper/pnghelper.cxx1
1 files changed, 1 insertions, 0 deletions
diff --git a/sdext/source/pdfimport/xpdfwrapper/pnghelper.cxx b/sdext/source/pdfimport/xpdfwrapper/pnghelper.cxx
index fd44fba4b016..71b0c8989228 100644
--- a/sdext/source/pdfimport/xpdfwrapper/pnghelper.cxx
+++ b/sdext/source/pdfimport/xpdfwrapper/pnghelper.cxx
@@ -35,6 +35,7 @@
#ifdef SYSTEM_ZLIB
#include "zlib.h"
#else
+#define ZLIB_INTERNAL 1
#include <zlib/zlib.h>
#endif