diff --git a/drivers/gpu/drm/udl/udl_encoder.c b/drivers/gpu/drm/udl/udl_encoder.c
index 0731ab2e6c06..0476bfe06d14 100644
--- a/drivers/gpu/drm/udl/udl_encoder.c
+++ b/drivers/gpu/drm/udl/udl_encoder.c
@@ -16,7 +16,7 @@
 #include "udl_drv.h"
 
 /* dummy encoder */
-void udl_enc_destroy(struct drm_encoder *encoder)
+static void udl_enc_destroy(struct drm_encoder *encoder)
 {
 	drm_encoder_cleanup(encoder);
 	kfree(encoder);