diff --git a/manifests/dbfile.pp b/manifests/dbfile.pp
index fd97201..043a6c6 100644
--- a/manifests/dbfile.pp
+++ b/manifests/dbfile.pp
@@ -47,11 +47,11 @@
 
   } else {
 
-    exec { "${postmap} ${title}":
+    exec { "${postmap} ${postfixdir}/${title}":
       cwd         => $postfixdir,
       subscribe   => File["${postfixdir}/${title}"],
       refreshonly => true,
-      # No need to notify the service, since it detects changed files
+      onlyif      => "/usr/bin/test ${postfixdir}/${title} -nt ${postfixdir}/${title}.db"
     }
 
   }