diff --git a/src/App.php b/src/App.php
index e576eb235..081e7785e 100644
--- a/src/App.php
+++ b/src/App.php
@@ -2004,6 +2004,6 @@ class App
 		}
 
 		$redirectTo = $this->getBaseURL($ssl) . '/' . ltrim($toUrl, '/');
-		System::externalRedirect($redirectTo);
+		Core\System::externalRedirect($redirectTo);
 	}
 }