diff --git a/dovecot.nix b/dovecot.nix
index d5cd031..1d36766 100644
--- a/dovecot.nix
+++ b/dovecot.nix
@@ -403,7 +403,9 @@ in {
 
           plugin {
             fts = xapian
-            fts_xapian = partial=3 full=20 ${optionalString cfg.debug "verbose"}
+            fts_xapian = partial=3 full=20 ${
+              optionalString cfg.debug "verbose=2"
+            }
             fts_autoindex = yes
             fts_enforced = yes
             fts_autoindex_exclude = \Trash