diff --git a/source/blender/python/api2_2x/Makefile b/source/blender/python/api2_2x/Makefile
index 5b0e1cfef8d..e5e0eb94665 100644
--- a/source/blender/python/api2_2x/Makefile
+++ b/source/blender/python/api2_2x/Makefile
@@ -45,6 +45,7 @@ endif
 CFLAGS += $(LEVEL_1_C_WARNINGS)
 
 
+CPPFLAGS += -I$(OPENGL_HEADERS)
 CPPFLAGS += -I$(NAN_GUARDEDALLOC)/include
 CPPFLAGS += -I../../makesdna
 CPPFLAGS += -I../../blenkernel