diff --git a/drivers/infiniband/sw/rxe/rxe_hdr.h b/drivers/infiniband/sw/rxe/rxe_hdr.h
index 46f82b27fcd2..1f0322491d8c 100644
--- a/drivers/infiniband/sw/rxe/rxe_hdr.h
+++ b/drivers/infiniband/sw/rxe/rxe_hdr.h
@@ -234,7 +234,7 @@ static inline void __bth_set_resv6a(void *arg)
 {
 	struct rxe_bth *bth = arg;
 
-	bth->qpn = cpu_to_be32(~BTH_RESV6A_MASK);
+	bth->qpn &= cpu_to_be32(~BTH_RESV6A_MASK);
 }
 
 static inline int __bth_ack(void *arg)