diff --git a/drivers/pinctrl/mediatek/pinctrl-paris.c b/drivers/pinctrl/mediatek/pinctrl-paris.c
index 2a9d2801388d..e486d66e220b 100644
--- a/drivers/pinctrl/mediatek/pinctrl-paris.c
+++ b/drivers/pinctrl/mediatek/pinctrl-paris.c
@@ -637,7 +637,7 @@ static void mtk_pctrl_dbg_show(struct pinctrl_dev *pctldev, struct seq_file *s,
 			  unsigned int gpio)
 {
 	struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev);
-	char buf[PIN_DBG_BUF_SZ];
+	char buf[PIN_DBG_BUF_SZ] = { 0 };
 
 	(void)mtk_pctrl_show_one_pin(hw, gpio, buf, PIN_DBG_BUF_SZ);