diff --git a/src/PhotoLayerImage.cpp b/src/PhotoLayerImage.cpp
index 62115a8..42a20bd 100644
--- a/src/PhotoLayerImage.cpp
+++ b/src/PhotoLayerImage.cpp
@@ -29,6 +29,7 @@
 
 #include "defs.h"
 #include "PhotoLayerImage.h"
+#include <GL/gl.h>
 
 WX_DEFINE_LIST(PhotoLayerImageCoordinateList);