diff --git a/src/mac/carbon/icon.cpp b/src/mac/carbon/icon.cpp
index 2d7a1a16b2..87c0ceb969 100644
--- a/src/mac/carbon/icon.cpp
+++ b/src/mac/carbon/icon.cpp
@@ -19,7 +19,7 @@
 
 #include "wx/mac/private.h"
 
-IMPLEMENT_DYNAMIC_CLASS(wxIcon, wxBitmap)
+IMPLEMENT_DYNAMIC_CLASS(wxIcon, wxGDIObject)
 
 #define M_ICONDATA ((wxIconRefData *)m_refData)