diff --git a/include/wlr/types/wlr_surface.h b/include/wlr/types/wlr_surface.h
index 423cc886..ca33423e 100644
--- a/include/wlr/types/wlr_surface.h
+++ b/include/wlr/types/wlr_surface.h
@@ -11,7 +11,7 @@
 enum wlr_surface_state_field {
 	WLR_SURFACE_STATE_BUFFER = 1,
 	WLR_SURFACE_STATE_SURFACE_DAMAGE = 2,
-	WLR_SURFACE_STATE_BUFFER_DAMAGE = 2,
+	WLR_SURFACE_STATE_BUFFER_DAMAGE = 4,
 	WLR_SURFACE_STATE_OPAQUE_REGION = 8,
 	WLR_SURFACE_STATE_INPUT_REGION = 16,
 	WLR_SURFACE_STATE_TRANSFORM = 32,