diff --git a/include/wx/mac/carbon/window.h b/include/wx/mac/carbon/window.h
index f7f5e8b337..16d5cfc663 100644
--- a/include/wx/mac/carbon/window.h
+++ b/include/wx/mac/carbon/window.h
@@ -65,7 +65,8 @@ public:
                           const wxRect *rect = NULL );
     virtual void Freeze();
     virtual void Thaw();
-
+    virtual bool IsFrozen() const;
+    
     virtual void Update() ;
     virtual void ClearBackground();
 
diff --git a/src/mac/carbon/window.cpp b/src/mac/carbon/window.cpp
index e6a954fa29..3183451f17 100644
--- a/src/mac/carbon/window.cpp
+++ b/src/mac/carbon/window.cpp
@@ -2301,6 +2301,11 @@ void wxWindowMac::Thaw()
 #endif
 }
 
+bool wxWindowMac::IsFrozen() const
+{
+    return m_frozenness != 0;
+}
+
 wxWindowMac *wxGetActiveWindow()
 {
     // actually this is a windows-only concept