diff --git a/src/mac/carbon/dcscreen.cpp b/src/mac/carbon/dcscreen.cpp
index 4c985b910f..74af9accb5 100644
--- a/src/mac/carbon/dcscreen.cpp
+++ b/src/mac/carbon/dcscreen.cpp
@@ -18,6 +18,10 @@
 
 IMPLEMENT_DYNAMIC_CLASS(wxScreenDC, wxWindowDC)
 
+// TODO : for the Screenshot use case, which doesn't work in Quartz
+// we should do a GetAsBitmap using something like
+// http://www.cocoabuilder.com/archive/message/cocoa/2005/8/13/144256
+
 // Create a DC representing the whole screen
 wxScreenDC::wxScreenDC()
 {