diff --git a/WObject-Flags.md b/WObject-Flags.md
index b49c707..741be65 100644
--- a/WObject-Flags.md
+++ b/WObject-Flags.md
@@ -10,3 +10,5 @@ ubclasses of WObject may have their own flags not used elsewhere; Certain flags
 | `1<<14` | Ignored; internal use |
 | `1<<18` | (Rooms only) Is VIP Only |
 | `1<<19` | (Rooms only) Is VIP View Only |
+| `1<<19` | (Surface only) U Flipped |
+| `1<<20` | (Surface only) V Flipped |
\ No newline at end of file