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-rw-r--r--include/freetype/ftincrem.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/include/freetype/ftincrem.h b/include/freetype/ftincrem.h
index e3477120e..6a1aa1fc3 100644
--- a/include/freetype/ftincrem.h
+++ b/include/freetype/ftincrem.h
@@ -22,6 +22,12 @@
#include <ft2build.h>
#include FT_FREETYPE_H
+#ifdef FREETYPE_H
+#error "freetype.h of FreeType 1 has been loaded!"
+#error "Please fix the directory search order for header files"
+#error "so that freetype.h of FreeType 2 is found first."
+#endif
+
FT_BEGIN_HEADER