diff --git a/drivers/pinctrl/nuvoton/pinctrl-wpcm450.c b/drivers/pinctrl/nuvoton/pinctrl-wpcm450.c
index 4589900244c7..cdad4ef11a2f 100644
--- a/drivers/pinctrl/nuvoton/pinctrl-wpcm450.c
+++ b/drivers/pinctrl/nuvoton/pinctrl-wpcm450.c
@@ -474,7 +474,7 @@ enum {
 #undef WPCM450_GRP
 };
 
-static struct pingroup wpcm450_groups[] = {
+static const struct pingroup wpcm450_groups[] = {
 #define WPCM450_GRP(x) PINCTRL_PINGROUP(#x, x ## _pins, ARRAY_SIZE(x ## _pins))
 	WPCM450_GRPS
 #undef WPCM450_GRP