diff --git a/cat.c b/cat.c
index 1890e49..b50380c 100644
--- a/cat.c
+++ b/cat.c
@@ -25,7 +25,7 @@ main(int argc, char *argv[])
 		usage();
 	} ARGEND;
 
-	if (argc == 0) {
+	if (!argc) {
 		concat(stdin, "<stdin>", stdout, "<stdout>");
 	} else {
 		for (; *argv; argc--, argv++) {