diff --git a/drivers/mtd/ubi/attach.c b/drivers/mtd/ubi/attach.c
index 9d2e16f3150a..b5e154856994 100644
--- a/drivers/mtd/ubi/attach.c
+++ b/drivers/mtd/ubi/attach.c
@@ -410,7 +410,7 @@ int ubi_compare_lebs(struct ubi_device *ubi, const struct ubi_ainf_peb *aeb,
 		second_is_newer = !second_is_newer;
 	} else {
 		dbg_bld("PEB %d CRC is OK", pnum);
-		bitflips = !!err;
+		bitflips |= !!err;
 	}
 	mutex_unlock(&ubi->buf_mutex);