1 files changed, 2 insertions, 2 deletions
diff --git a/src/client/util/UndoManager.ts b/src/client/util/UndoManager.ts
index 7abb9d1ee..472afac1d 100644
--- a/src/client/util/UndoManager.ts
+++ b/src/client/util/UndoManager.ts
@@ -73,8 +73,8 @@ export namespace UndoManager {
     }
     type UndoBatch = UndoEvent[];
 
-    let undoStack: UndoBatch[] = observable([]);
-    let redoStack: UndoBatch[] = observable([]);
+    export let undoStack: UndoBatch[] = observable([]);
+    export let redoStack: UndoBatch[] = observable([]);
     let currentBatch: UndoBatch | undefined;
     let batchCounter = 0;
     let undoing = false;