diff --git a/include/linux/mlx5/mlx5_ifc.h b/include/linux/mlx5/mlx5_ifc.h
index ea65131835ab..69985e4d8dfe 100644
--- a/include/linux/mlx5/mlx5_ifc.h
+++ b/include/linux/mlx5/mlx5_ifc.h
@@ -1419,8 +1419,9 @@ struct mlx5_ifc_cmd_hca_cap_bits {
 	u8         reserved_at_130[0xa];
 	u8         log_max_ra_res_dc[0x6];
 
-	u8         reserved_at_140[0x6];
+	u8         reserved_at_140[0x5];
 	u8         release_all_pages[0x1];
+	u8         must_not_use[0x1];
 	u8         reserved_at_147[0x2];
 	u8         roce_accl[0x1];
 	u8         log_max_ra_req_qp[0x6];