diff --git a/drivers/net/mlx4/mlx4.c b/drivers/net/mlx4/mlx4.c
index 96f5af8069..8397f408f4 100644
--- a/drivers/net/mlx4/mlx4.c
+++ b/drivers/net/mlx4/mlx4.c
@@ -204,6 +204,7 @@ mlx4_proc_priv_init(struct rte_eth_dev *dev)
 	struct mlx4_proc_priv *ppriv;
 	size_t ppriv_size;
 
+	mlx4_proc_priv_uninit(dev);
 	/*
 	 * UAR register table follows the process private structure. BlueFlame
 	 * registers for Tx queues are stored in the table.