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-rw-r--r--src/hexcolour.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/src/hexcolour.h b/src/hexcolour.h
index def95f4..49f423c 100644
--- a/src/hexcolour.h
+++ b/src/hexcolour.h
@@ -14,6 +14,9 @@
* PERFORMANCE OF THIS SOFTWARE.
*/
+#ifndef INC_HEXCOLOUR_H
+#define INC_HEXCOLOUR_H
+
#include "intdefs.h"
/*
@@ -33,4 +36,6 @@ void hexcolour_rgb(uchar out[static 4], const char *s);
*/
void hexcolour_rgba(uchar out[static 4], const char *s);
+#endif
+
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