diff --git a/gfx/layers/opengl/ContainerLayerOGL.cpp b/gfx/layers/opengl/ContainerLayerOGL.cpp
index e6fafa80266..9b16a36ce91 100644
--- a/gfx/layers/opengl/ContainerLayerOGL.cpp
+++ b/gfx/layers/opengl/ContainerLayerOGL.cpp
@@ -146,7 +146,7 @@ ContainerLayerOGL::GetFirstChildOGL()
 
 static inline GLint GetYCoordOfRectStartingFromBottom(GLint y, GLint height, GLint viewportHeight)
 {
-#ifdef XP_MAC
+#ifdef XP_MACOSX
     (void) height;
     (void) viewportHeight;
     return y;