diff --git a/service.inc b/service.inc
index 3af259b..cfeaf12 100644
--- a/service.inc
+++ b/service.inc
@@ -64,6 +64,7 @@ class SearchApiSolrService extends SearchApiAbstractService {
   protected $request_handler = NULL;
 
   public function __construct(SearchApiServer $server) {
+    spl_autoload_register('_search_api_solr_autoload');
     parent::__construct($server);
   }