--- OLD/builtin-diff.c	Thu Jan  1 00:00:00 1970
+++ NEW/builtin-diff.c	Thu Jan  1 00:00:00 1970
@@ -92,7 +92,7 @@
 			      int argc, const char **argv,
 			      struct blobinfo *blob)
 {
-	unsigned mode = canon_mode(S_IFREG | 0644);
+	unsigned mode = canon_mode((S_IFREG | 0644));
 
 	if (argc > 1)
 		usage(builtin_diff_usage);