diff --git a/configs/samv71-xult/src/sam_ili9488.c b/configs/samv71-xult/src/sam_ili9488.c
index 3d77516cd77..1732a7764c8 100644
--- a/configs/samv71-xult/src/sam_ili9488.c
+++ b/configs/samv71-xult/src/sam_ili9488.c
@@ -1428,7 +1428,7 @@ static inline void sam_smc_initialize(void)
 static inline int sam_lcd_initialize(void)
 {
   FAR struct sam_dev_s *priv = &g_lcddev;
-  uint8_t buffer[4];
+  uint8_t buffer[4] = {0, 0, 0, 0};
   uint16_t id;
   uint16_t param;
   int ret;