diff --git a/roles/koschei/backend/templates/config-backend.cfg.j2 b/roles/koschei/backend/templates/config-backend.cfg.j2
index 647b08d96c..cdffc6332c 100644
--- a/roles/koschei/backend/templates/config-backend.cfg.j2
+++ b/roles/koschei/backend/templates/config-backend.cfg.j2
@@ -61,7 +61,7 @@ config = {
             "memory_limit": 1024**2,  # kilobytes
         },
         "watcher": {
-            "memory_limit": 256**2,  # kilobytes
+            "memory_limit": 256*1024,  # kilobytes
         },
     },
     "priorities": {