diff --git a/lib/deprecatedlib.php b/lib/deprecatedlib.php
index 852b0e72ab1..2d81c77c422 100644
--- a/lib/deprecatedlib.php
+++ b/lib/deprecatedlib.php
@@ -4375,3 +4375,17 @@ function count_login_failures($mode, $username, $lastlogin) {
     }
     return NULL;
 }
+
+/**
+ * Returns whether ajax is enabled/allowed or not.
+ * This function is deprecated and always returns true.
+ *
+ * @param array $unused - not used any more.
+ * @return bool
+ * @deprecated since 2.7 MDL-33099 - please do not use this function any more.
+ * @todo MDL-44088 This will be removed in Moodle 2.9.
+ */
+function ajaxenabled(array $browsers = null) {
+    debugging('ajaxenabled() is deprecated - please update your code to assume it returns true.', DEBUG_DEVELOPER);
+    return true;
+}
diff --git a/tag/edit.php b/tag/edit.php
index 005dfdc79d6..e9449f7c925 100644
--- a/tag/edit.php
+++ b/tag/edit.php
@@ -162,8 +162,7 @@ if (!empty($errorstring)) {
 
 $tagform->display();
 
-if (ajaxenabled()) {
-    $PAGE->requires->js('/tag/tag.js');
-    $PAGE->requires->js_function_call('init_tag_autocomplete', null, true);
-}
+$PAGE->requires->js('/tag/tag.js');
+$PAGE->requires->js_function_call('init_tag_autocomplete', null, true);
+
 echo $OUTPUT->footer();