diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index 621dee8b8cb29f40a2e8a53c9e608b4fbe09bea5..10506f9cd0c929da622b667c22fcee071c522bd2 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -632,7 +632,7 @@ static void scsi_free_sgtable(struct scatterlist *sgl, int index)
 {
 	struct scsi_host_sg_pool *sgp;
 
-	BUG_ON(index > SG_MEMPOOL_NR);
+	BUG_ON(index >= SG_MEMPOOL_NR);
 
 	sgp = scsi_sg_pools + index;
 	mempool_free(sgl, sgp->pool);