Index: mozilla/intl/uconv/native/nsNativeUConvService.cpp
===================================================================
RCS file: /cvsroot/mozilla/intl/uconv/native/nsNativeUConvService.cpp,v
retrieving revision 1.7
diff -u -r1.7 mozilla/intl/uconv/native/nsNativeUConvService.cpp
--- mozilla/intl/uconv/native/nsNativeUConvService.cpp
+++ mozilla/intl/uconv/native/nsNativeUConvService.cpp
@@ -375,11 +375,12 @@
 {
     *aResult = nsnull;
 
-    nsRefPtr<IConvAdaptor> ucl = new IConvAdaptor();
+    IConvAdaptor* adaptor = new IConvAdaptor();
+    nsCOMPtr<nsISupports> ucl(NS_STATIC_CAST(nsIUnicodeDecoder*, adaptor));
     if (!ucl)
         return NS_ERROR_OUT_OF_MEMORY;
 
-    nsresult rv = ucl->Init(from, to);
+    nsresult rv = adaptor->Init(from, to);
     if (NS_SUCCEEDED(rv))
         NS_ADDREF(*aResult = ucl);