@@ -235,11 +235,11 @@
 	if (_diskNumber == 0xFFFF ||
 	    _centralDirectoryDisk == 0xFFFF ||
 	    _centralDirectoryEntriesInDisk == 0xFFFF ||
 	    _centralDirectoryEntries == 0xFFFF ||
 	    _centralDirectorySize == 0xFFFFFFFF ||
-	    _centralDirectoryOffset == -1) {
+	    _centralDirectoryOffset == 0xFFFFFFFF) {
 		int64_t offset64;
 		uint64_t size;
 
 		seekOrThrowInvalidFormat(_stream, offset - 20, SEEK_END);