diff --git a/manifests/app.pp b/manifests/app.pp
index bb4d067..2a9e381 100644
--- a/manifests/app.pp
+++ b/manifests/app.pp
@@ -17,6 +17,12 @@ class mediawiki::app {
     source   => 'https://gerrit.wikimedia.org/r/p/mediawiki/vendor.git',
     revision => $revision,
   }
+  file { '/srv/mediawiki/w/cache':
+    ensure  => directory,
+    recurse => true,
+    owner   => 'www-data',
+    group   => 'www-data',
+  }
 }
 
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