diff --git a/src/mac/carbon/dcscreen.cpp b/src/mac/carbon/dcscreen.cpp
index 85ca733a5e..f5012952b9 100644
--- a/src/mac/carbon/dcscreen.cpp
+++ b/src/mac/carbon/dcscreen.cpp
@@ -34,8 +34,10 @@ wxScreenDC::wxScreenDC()
     SetPort( port ) ;
     m_macLocalOrigin.x = -pt.h ;
     m_macLocalOrigin.y = -pt.v ;
+#if wxMAC_USE_CORE_GRAPHICS
     m_macLocalOriginInPort = m_macLocalOrigin ;
-
+#endif
+    
     BitMap screenBits;
     GetQDGlobalsScreenBits( &screenBits );
     m_minX = screenBits.bounds.left ;