diff --git a/drivers/net/ethernet/mellanox/mlx5/core/sf/mlx5_ifc_vhca_event.h b/drivers/net/ethernet/mellanox/mlx5/core/sf/mlx5_ifc_vhca_event.h
index 1daf5a122ba3..4fc870140d71 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/sf/mlx5_ifc_vhca_event.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/sf/mlx5_ifc_vhca_event.h
@@ -20,7 +20,7 @@ struct mlx5_ifc_vhca_state_context_bits {
 
 	u8         sw_function_id[0x20];
 
-	u8         reserved_at_40[0x80];
+	u8         reserved_at_40[0x40];
 };
 
 struct mlx5_ifc_query_vhca_state_out_bits {