diff --git l10n_client.js l10n_client.js
index c610c5a..739dab8 100644
--- l10n_client.js
+++ l10n_client.js
@@ -12,7 +12,7 @@ jQuery.extend(Drupal, {
       switch(pressed) {
         case 'toggle':
           // Grab user-hilighted text & send it into the search filter
-          userSelection = window.getSelection ? window.getSelection() : document.getSelection ? document.getSelection() : document.selection.createRange().text;
+          var userSelection = window.getSelection ? window.getSelection() : document.getSelection ? document.getSelection() : document.selection.createRange().text;
           userSelection = String(userSelection);
           if(userSelection.length > 0) {
             Drupal.l10nClient.filter(userSelection);