diff --git a/drivers/infiniband/hw/i40iw/i40iw_verbs.c b/drivers/infiniband/hw/i40iw/i40iw_verbs.c
index 3c6f3ce88f892..9f18997b2e9e6 100644
--- a/drivers/infiniband/hw/i40iw/i40iw_verbs.c
+++ b/drivers/infiniband/hw/i40iw/i40iw_verbs.c
@@ -1637,6 +1637,7 @@ static struct ib_mr *i40iw_alloc_mr(struct ib_pd *pd,
 		err_code = -EOVERFLOW;
 		goto err;
 	}
+	stag &= ~I40IW_CQPSQ_STAG_KEY_MASK;
 	iwmr->stag = stag;
 	iwmr->ibmr.rkey = stag;
 	iwmr->ibmr.lkey = stag;