diff --git a/drivers/gpu/drm/bridge/ptn3460.c b/drivers/gpu/drm/bridge/ptn3460.c
index 826833e396f0930886e438edc1ef97f652ef2a77..9d2f053382e1889acbd8be4048403292c8615884 100644
--- a/drivers/gpu/drm/bridge/ptn3460.c
+++ b/drivers/gpu/drm/bridge/ptn3460.c
@@ -265,7 +265,7 @@ static struct drm_connector_funcs ptn3460_connector_funcs = {
 	.destroy = ptn3460_connector_destroy,
 };
 
-int ptn3460_bridge_attach(struct drm_bridge *bridge)
+static int ptn3460_bridge_attach(struct drm_bridge *bridge)
 {
 	struct ptn3460_bridge *ptn_bridge = bridge_to_ptn3460(bridge);
 	int ret;