@@ -159,12 +159,11 @@
 	return ret;
 }
 
 - init
 {
-	if ([self class] == [OFDictionary class] ||
-	    [self class] == [OFMutableDictionary class]) {
+	if (isa == [OFDictionary class]) {
 		Class c = isa;
 		[self release];
 		@throw [OFNotImplementedException newWithClass: c
 						      selector: _cmd];
 	}