diff --git a/include/drm/drm_plane_helper.h b/include/drm/drm_plane_helper.h
index ff83d2621687..3a574e8cd22f 100644
--- a/include/drm/drm_plane_helper.h
+++ b/include/drm/drm_plane_helper.h
@@ -26,6 +26,7 @@
 
 #include <linux/types.h>
 
+struct drm_atomic_state;
 struct drm_crtc;
 struct drm_framebuffer;
 struct drm_modeset_acquire_ctx;