diff --git a/sys/dev/mlx5/mlx5_core/mlx5_vport.c b/sys/dev/mlx5/mlx5_core/mlx5_vport.c
index 6ef50195345..a3e1751b8b5 100644
--- a/sys/dev/mlx5/mlx5_core/mlx5_vport.c
+++ b/sys/dev/mlx5/mlx5_core/mlx5_vport.c
@@ -71,7 +71,7 @@ static int mlx5_query_nic_vport_context(struct mlx5_core_dev *mdev, u32 vport,
 int mlx5_vport_alloc_q_counter(struct mlx5_core_dev *mdev, int *counter_set_id)
 {
 	u32 in[MLX5_ST_SZ_DW(alloc_q_counter_in)];
-	u32 out[MLX5_ST_SZ_DW(alloc_q_counter_in)];
+	u32 out[MLX5_ST_SZ_DW(alloc_q_counter_out)];
 	int err;
 
 	memset(in, 0, sizeof(in));