diff --git a/usr.bin/which/which.c b/usr.bin/which/which.c
index f55871a76efa..cea0ce676f2f 100644
--- a/usr.bin/which/which.c
+++ b/usr.bin/which/which.c
@@ -86,7 +86,7 @@ main(int argc, char **argv)
 	while (argc > 0) {
 		memcpy(path, p, pathlen);
 	
-		if (strlen(*argv) > FILENAME_MAX ||
+		if (strlen(*argv) >= FILENAME_MAX ||
 		    print_matches(path, *argv) == -1)
 			status = EXIT_FAILURE;