diff --git a/sbin/dump/main.c b/sbin/dump/main.c
index 627516869f50..62d1caf04cb5 100644
--- a/sbin/dump/main.c
+++ b/sbin/dump/main.c
@@ -257,7 +257,7 @@ main(argc, argv)
 		tape = index(host, ':');
 		*tape++ = '\0';
 #ifdef RDUMP
-		if (index(tape, "\n") {
+		if (index(tape, '\n')) {
 		    (void)fprintf(stderr, "invalid characters in tape\n");
 		    exit(X_ABORT);
 		}