diff --git a/lib/base.php b/lib/base.php
index 730cee5231d21a22462c4791902e397c7139d8db..939b23f87f9398d39f359fdde0928b0557cfeacf 100644
--- a/lib/base.php
+++ b/lib/base.php
@@ -214,6 +214,8 @@ class OC {
 			if (!OC::$CLI) {
 				$url = 'http://' . $_SERVER['SERVER_NAME'] . OC::$WEBROOT . '/index.php';
 				header("Location: $url");
+			} else {
+				throw new Exception("Not installed");
 			}
 			exit();
 		}