diff --git a/target/linux/ramips/patches-4.9/0025-pinctrl-ralink-add-pinctrl-driver.patch b/target/linux/ramips/patches-4.9/0025-pinctrl-ralink-add-pinctrl-driver.patch
index 6e0d6431f0..dc4585231b 100644
--- a/target/linux/ramips/patches-4.9/0025-pinctrl-ralink-add-pinctrl-driver.patch
+++ b/target/linux/ramips/patches-4.9/0025-pinctrl-ralink-add-pinctrl-driver.patch
@@ -193,7 +193,7 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
 +	}
 +
 +	if (!max_maps)
-+		return max_maps;
++		return -EINVAL;
 +
 +	*map = kzalloc(max_maps * sizeof(struct pinctrl_map), GFP_KERNEL);
 +	if (!*map)