1 files changed, 1 insertions, 0 deletions
diff --git a/src/lua.h b/src/lua.h
index ce3d0e4..b4ea5f2 100644
--- a/src/lua.h
+++ b/src/lua.h
@@ -15,6 +15,7 @@ enum deep_copy_flags {
   SKIP__G = (1 << 3),
   SKIP_LOCALS = (1 << 4),
   STRIP_GC = (1 << 5),
+  IS_UPVALUE = (1 << 6),
 };
 #endif