diff --git a/mozilla/gfx/public/gfxCore.h b/mozilla/gfx/public/gfxCore.h
index 007cb0ff279..05166f0f244 100644
--- a/mozilla/gfx/public/gfxCore.h
+++ b/mozilla/gfx/public/gfxCore.h
@@ -46,7 +46,7 @@
 #define NS_SIDE_BOTTOM  2
 #define NS_SIDE_LEFT    3
 
-#ifdef MOZ_ENABLE_LIBXUL
+#ifdef MOZ_ENABLE_LIBXUL || !defined(MOZILLA_INTERNAL_API)
 #  define NS_GFX
 #  define NS_GFX_(type) type
 #  define NS_GFX_STATIC_MEMBER_(type) type