diff --git a/js/rte.js b/js/rte.js
index b8f1b0b7d3..5f89835d54 100644
--- a/js/rte.js
+++ b/js/rte.js
@@ -169,7 +169,7 @@ RTE.COMMON = {
                 /**
                  * Display the dialog to the user
                  */
-                data.message = '<textarea cols="40" rows="15" style="width: 100%;">' + data.message + '</textarea>';
+                data.message = '<textarea cols="40" rows="15" class="all100">' + data.message + '</textarea>';
                 var $ajaxDialog = $('<div>' + data.message + '</div>').dialog({
                     width: 500,
                     buttons: button_options,