diff --git a/drivers/md/dm-verity-target.c b/drivers/md/dm-verity-target.c
index a3c1682a2298..53150024d2dd 100644
--- a/drivers/md/dm-verity-target.c
+++ b/drivers/md/dm-verity-target.c
@@ -24,7 +24,7 @@
 
 #define DM_MSG_PREFIX			"verity"
 
-#define DM_VERITY_ENV_LENGTH		42
+#define DM_VERITY_ENV_LENGTH		46
 #define DM_VERITY_ENV_VAR_NAME		"DM_VERITY_ERR_BLOCK_NR"
 
 #define DM_VERITY_DEFAULT_PREFETCH_SIZE	262144