diff --git fivestar.module fivestar.module
index 9c3f15a..1095595 100644
--- fivestar.module
+++ fivestar.module
@@ -1793,25 +1793,27 @@ function fivestar_votingapi_metadata_alter(&$data) {
   static $tags;  
   if (!isset($tags)) {
     $tags = array();
-    
-    module_load_install('content');
-    module_load_include('inc', 'content', 'includes/content.admin');
-    module_load_include('inc', 'content', 'includes/content.crud');
-
-    // Grab the list of fields to update.
-    foreach (content_types_install() as $type_name => $fields) {
-      foreach ($fields as $field) {
-        if ($field['type'] == 'fivestar') {
-          if (!empty($field['axis'])) {
-            $data['tags'][$field['axis']] = array(
-              'name' => drupal_ucfirst($field['axis']),
-              'description' => t('Used by %field in the %type content type.', array('%type' => $type_name, '%field' => $field['field_name'])),
-              'module' => 'fivestar', // This is optional; we can add it for our own purposes.
-            );
+
+    if (module_exists('content')) {
+      module_load_install('content');
+      module_load_include('inc', 'content', 'includes/content.admin');
+      module_load_include('inc', 'content', 'includes/content.crud');
+
+      // Grab the list of fields to update.
+      foreach (content_types_install() as $type_name => $fields) {
+        foreach ($fields as $field) {
+          if ($field['type'] == 'fivestar') {
+            if (!empty($field['axis'])) {
+              $data['tags'][$field['axis']] = array(
+                'name' => drupal_ucfirst($field['axis']),
+                'description' => t('Used by %field in the %type content type.', array('%type' => $type_name, '%field' => $field['field_name'])),
+                'module' => 'fivestar', // This is optional; we can add it for our own purposes.
+              );
+            }
           }
         }
       }
     }
   }
   return $tags;
-}
\ No newline at end of file
+}