@@ -351,10 +351,13 @@
 		@throw [OFNotOpenException exceptionWithObject: self];
 
 	if (_atEndOfStream)
 		return 0;
 
+	if (length > UINT64_MAX)
+		@throw [OFOutOfRangeException exception];
+
 	if ((uint64_t)length > _toRead)
 		length = (size_t)_toRead;
 
 	ret = [_stream readIntoBuffer: buffer
 			       length: length];