diff --git a/modules/file/file.js b/modules/file/file.js
index 1071384..33d736f 100644
--- a/modules/file/file.js
+++ b/modules/file/file.js
@@ -74,7 +74,7 @@ Drupal.file = Drupal.file || {
       var acceptableMatch = new RegExp('\\.(' + extensionPattern + ')$', 'gi');
       if (!acceptableMatch.test(this.value)) {
         var error = Drupal.t("The selected file %filename cannot be uploaded. Only files with the following extensions are allowed: %extensions.", {
-          '%filename': this.value,
+          '%filename': /[^\\\/]*$/.exec(this.value),
           '%extensions': extensionPattern.replace(/\|/g, ', ')
         });
         $(this).parents('div.form-managed-file').prepend('<div class="messages error file-upload-js-error">' + error + '</div>');