diff --git a/src/mac/carbon/overlay.cpp b/src/mac/carbon/overlay.cpp
index 0a1fb54073..2f84cb309c 100644
--- a/src/mac/carbon/overlay.cpp
+++ b/src/mac/carbon/overlay.cpp
@@ -142,7 +142,7 @@ void wxOverlayImpl::BeginDrawing( wxWindowDC* dc)
 void wxOverlayImpl::EndDrawing( wxWindowDC* dc)
 {
     dc->SetGraphicsContext(NULL);
-    CGContextSynchronize( m_overlayContext );
+    CGContextFlush( m_overlayContext );
 }
 
 void wxOverlayImpl::Clear(wxWindowDC* dc)