diff --git a/drivers/staging/mt7621-gpio/gpio-mt7621.c b/drivers/staging/mt7621-gpio/gpio-mt7621.c
index 830d42990244..51235687ddb6 100644
--- a/drivers/staging/mt7621-gpio/gpio-mt7621.c
+++ b/drivers/staging/mt7621-gpio/gpio-mt7621.c
@@ -38,7 +38,7 @@ static void __iomem *mediatek_gpio_membase;
 static int mediatek_gpio_irq;
 static struct irq_domain *mediatek_gpio_irq_domain;
 
-struct mtk_gc {
+static struct mtk_gc {
 	struct gpio_chip chip;
 	spinlock_t lock;
 	int bank;