diff --git a/drivers/gpu/drm/gma500/oaktrail_device.c b/drivers/gpu/drm/gma500/oaktrail_device.c
index 2b79fbb0d137b66ba4185ea7d6b07a78717d704c..41d1924ea31e300ca20d6a3eb1793072b43bb69e 100644
--- a/drivers/gpu/drm/gma500/oaktrail_device.c
+++ b/drivers/gpu/drm/gma500/oaktrail_device.c
@@ -141,7 +141,7 @@ static const struct backlight_ops oaktrail_ops = {
 	.update_status  = oaktrail_set_brightness,
 };
 
-int oaktrail_backlight_init(struct drm_device *dev)
+static int oaktrail_backlight_init(struct drm_device *dev)
 {
 	struct drm_psb_private *dev_priv = dev->dev_private;
 	int ret;