@@ -39,11 +39,11 @@
 		[self doesNotRecognizeSelector: _cmd];
 		abort();
 	}
 
 	pool = objc_autoreleasePoolPush();
-	element = [(id)self XMLElementBySerializing];
+	element = ((id <OFSerialization>)self).XMLElementBySerializing;
 
 	root = [OFXMLElement elementWithName: @"serialization"
 				   namespace: OF_SERIALIZATION_NS];
 	[root addAttributeWithName: @"version"
 		       stringValue: @"1"];