diff --git a/drivers/pwm/pwm-mxs.c b/drivers/pwm/pwm-mxs.c
index 23d5180..3febdddf 100644
--- a/drivers/pwm/pwm-mxs.c
+++ b/drivers/pwm/pwm-mxs.c
@@ -179,7 +179,7 @@
 	return pwmchip_remove(&mxs->chip);
 }
 
-static struct of_device_id mxs_pwm_dt_ids[] = {
+static const struct of_device_id mxs_pwm_dt_ids[] = {
 	{ .compatible = "fsl,imx23-pwm", },
 	{ /* sentinel */ }
 };