diff --git a/drivers/net/ethernet/mellanox/mlxsw/core.h b/drivers/net/ethernet/mellanox/mlxsw/core.h
index e5474d3e34db..c6bc5819ce43 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/core.h
+++ b/drivers/net/ethernet/mellanox/mlxsw/core.h
@@ -624,7 +624,7 @@ struct mlxsw_linecards {
 	struct mlxsw_linecard_types_info *types_info;
 	struct list_head event_ops_list;
 	struct mutex event_ops_list_lock; /* Locks accesses to event ops list */
-	struct mlxsw_linecard linecards[];
+	struct mlxsw_linecard linecards[] __counted_by(count);
 };
 
 static inline struct mlxsw_linecard *