diff --git a/drivers/gpu/drm/sun4i/sunxi_engine.h b/drivers/gpu/drm/sun4i/sunxi_engine.h
index baa7a1f953001bcc7012da14d53775fd4b3dbf35..d317ea04b8aa629f7e17e276bb8df87259d692cd 100644
--- a/drivers/gpu/drm/sun4i/sunxi_engine.h
+++ b/drivers/gpu/drm/sun4i/sunxi_engine.h
@@ -12,6 +12,7 @@
 
 struct drm_plane;
 struct drm_device;
+struct drm_crtc_state;
 
 struct sunxi_engine;