diff --git a/actions/public.php b/actions/public.php
index f5380589aa..47b8e16cd2 100644
--- a/actions/public.php
+++ b/actions/public.php
@@ -56,6 +56,11 @@ class PublicAction extends Action
 
     var $page = null;
 
+    function isReadOnly()
+    {
+        return true;
+    }
+
     /**
      * Read and validate arguments
      *