diff --git a/drivers/gpio/gpio-mockup.c b/drivers/gpio/gpio-mockup.c
index 1ef85b0c2b1f2cc414f2393cd035a94a03ed7565..af0c1e83560512206058b559091680cddf6973b7 100644
--- a/drivers/gpio/gpio-mockup.c
+++ b/drivers/gpio/gpio-mockup.c
@@ -43,7 +43,7 @@ static int gpio_mockup_ranges[MAX_GC << 1];
 static int gpio_mockup_params_nr;
 module_param_array(gpio_mockup_ranges, int, &gpio_mockup_params_nr, 0400);
 
-const char pins_name_start = 'A';
+static const char pins_name_start = 'A';
 
 static int mockup_gpio_get(struct gpio_chip *gc, unsigned int offset)
 {