diff --git a/src/viced/callback.c b/src/viced/callback.c
index 02a0b4173f..f152e0c38f 100644
--- a/src/viced/callback.c
+++ b/src/viced/callback.c
@@ -1761,7 +1761,7 @@ int main(int argc, char **argv)
     }
     if (err || argc != 1) {
 	fprintf(stderr,
-		"Usage: cbd [-host cbid] [-fid volume vnode] [-stats] callbackdumpfile\n");
+		"Usage: cbd [-host cbid] [-fid volume vnode] [-stats] [-all] callbackdumpfile\n");
 	fprintf(stderr, "[cbid is shown for each host in the hosts.dump file]\n");
 	exit(1);
     }