diff --git a/advagg.admin.inc b/advagg.admin.inc
index fba1814..4e1bbc7 100644
--- a/advagg.admin.inc
+++ b/advagg.admin.inc
@@ -207,6 +207,12 @@ function advagg_admin_settings_form($form, $form_state) {
     '#description' => t('All aggregated files can be pre-compressed into a .gz file and
    served from Apache. This is faster then gzipping the file on each request.'),
   );
+  $form['global']['obscure']['advagg_ajax_render_alter'] = array(
+    '#type' => 'checkbox',
+    '#title' => t('Run advagg_ajax_render_alter()'),
+    '#default_value' => variable_get('advagg_ajax_render_alter', ADVAGG_AJAX_RENDER_ALTER),
+    '#description' => t('If disabled, AdvAgg will not alter the aggregates returned by ajax requests.'),
+  );
   $form['global']['obscure']['advagg_include_base_url'] = array(
     '#type' => 'checkbox',
     '#title' => t('Include the base_url variable in the hooks hash array.'),
diff --git a/advagg.module b/advagg.module
index 3417641..3387eb9 100644
--- a/advagg.module
+++ b/advagg.module
@@ -168,6 +168,11 @@ define('ADVAGG_FORCE_HTTPS_PATH', FALSE);
  */
 define('ADVAGG_CSS_IN_JS', FALSE);
 
+/**
+ * Set to FALSE to not alter the CSS/JS pushed out from AdvAgg.
+ */
+define('ADVAGG_AJAX_RENDER_ALTER', TRUE);
+
 // Core hook implementations.
 /**
  * Inbound URL rewrite helper.
@@ -618,6 +623,11 @@ function advagg_ajax_render_alter(&$commands) {
     return;
   }
 
+  // Do not run hook if advagg_ajax_render_alter is FALSE.
+  if (!variable_get('advagg_ajax_render_alter', ADVAGG_AJAX_RENDER_ALTER)) {
+    return;
+  }
+
   // Conditionally adds the default Drupal/jQuery libraries to the page.
   // @see http://drupal.org/node/1279226
   if (function_exists('drupal_add_js_page_defaults')) {