diff --git a/piwigo/config.json b/piwigo/config.json
index 1af2471ec..b4a8cda63 100644
--- a/piwigo/config.json
+++ b/piwigo/config.json
@@ -22,6 +22,7 @@
   ],
   "full_access": true,
   "map":[
+      "config:rw",
       "media:rw",
       "share:rw",
       "ssl"