@@ -159,10 +159,13 @@
 }
 
 - (bool)isEqual: (id)object
 {
 	OFMessagePackExtension *extension;
+
+	if (object == self)
+		return true;
 
 	if (![object isKindOfClass: [OFMessagePackExtension class]])
 		return false;
 
 	extension = object;