diff --git a/sbin/fdisk/fdisk.c b/sbin/fdisk/fdisk.c
index 6cfa2b510f22..d9514555ae34 100644
--- a/sbin/fdisk/fdisk.c
+++ b/sbin/fdisk/fdisk.c
@@ -380,7 +380,8 @@ main(int argc, char *argv[])
 	printf("******* Working on device %s *******\n",disk);
 
 	if (I_flag) {
-		read_s0();
+		if (read_s0())
+			warnx("Ignoring bad existing MBR.");
 		reset_boot();
 		partp = &mboot.parts[0];
 		partp->dp_typ = DOSPTYP_386BSD;
@@ -410,8 +411,10 @@ main(int argc, char *argv[])
 	    else
 		print_params();
 
-	    if (read_s0())
+	    if (read_s0()) {
+		printf("Will replace existing bad MBR\n");
 		init_sector0(dos_sectors);
+	    }
 
 	    printf("Media sector size is %d\n", secsize);
 	    printf("Warning: BIOS sector numbering starts with sector 1\n");