diff --git a/src/osx/core/cfstring.cpp b/src/osx/core/cfstring.cpp
index 384bf88e72..612dc39a5d 100644
--- a/src/osx/core/cfstring.cpp
+++ b/src/osx/core/cfstring.cpp
@@ -638,7 +638,7 @@ wxString wxCFStringRef::AsStringWithNormalizationFormC( CFStringRef ref, wxFontE
 
     CFMutableStringRef cfMutableString = CFStringCreateMutableCopy(NULL, 0, ref);
     CFStringNormalize(cfMutableString,kCFStringNormalizationFormC);
-    wxString str = wxCFStringRef::AsString(ref,encoding);
+    wxString str = wxCFStringRef::AsString(cfMutableString,encoding);
     CFRelease(cfMutableString);
     return str;
 }