diff --git a/backend/store.py b/backend/store.py
index d956410e..987a2fe1 100644
--- a/backend/store.py
+++ b/backend/store.py
@@ -144,6 +144,7 @@ class ChangeDetectionStore:
         })
 
         self.data['watching'][new_uuid] = _blank
+        self.needs_write = True
         return new_uuid