diff --git a/src/mac/bitmap.cpp b/src/mac/bitmap.cpp
index 2e85e12323..a37654c059 100644
--- a/src/mac/bitmap.cpp
+++ b/src/mac/bitmap.cpp
@@ -246,6 +246,7 @@ wxList wxBitmapBase::sm_handlers;
 bool wxBitmap::CopyFromIcon(const wxIcon& icon)
 {
     Ref(icon) ;
+    return true;
 }
 
 wxBitmap::wxBitmap()
diff --git a/src/mac/carbon/bitmap.cpp b/src/mac/carbon/bitmap.cpp
index 2e85e12323..a37654c059 100644
--- a/src/mac/carbon/bitmap.cpp
+++ b/src/mac/carbon/bitmap.cpp
@@ -246,6 +246,7 @@ wxList wxBitmapBase::sm_handlers;
 bool wxBitmap::CopyFromIcon(const wxIcon& icon)
 {
     Ref(icon) ;
+    return true;
 }
 
 wxBitmap::wxBitmap()