diff --git a/lib/autoload.php b/lib/autoload.php
index db10dc867..9ee03077e 100644
--- a/lib/autoload.php
+++ b/lib/autoload.php
@@ -14,10 +14,7 @@ if (PHP_VERSION_ID < 50600) {
             echo $err;
         }
     }
-    trigger_error(
-        $err,
-        E_USER_ERROR
-    );
+    throw new RuntimeException($err);
 }
 
 require_once __DIR__ . '/composer/autoload_real.php';