@@ -752,11 +752,11 @@
 			    initWithStream: stream];
 			break;
 		default:
 			@throw [OFNotImplementedException
 			    exceptionWithSelector: _cmd
-					   object: self];
+					   object: nil];
 		}
 
 		_entry = [entry copy];
 		_toRead = entry.uncompressedSize;
 		_CRC32 = ~0;