diff --git a/static/js/preferencesDialog.js b/static/js/preferencesDialog.js
index 12010e11..6e7a700f 100644
--- a/static/js/preferencesDialog.js
+++ b/static/js/preferencesDialog.js
@@ -181,7 +181,7 @@ pandora.ui.preferencesDialog = function() {
                     ).append(
                         Ox.Button({
                             title: Ox._('Manage Cache...'),
-                            disabled: !pandora.fs.enabled
+                            disabled: !pandora.fs.enabled,
                             width: 160
                         })
                         .bindEvent({