diff --git a/common/content/liberator.js b/common/content/liberator.js
index f4f4df7f..c07cef75 100644
--- a/common/content/liberator.js
+++ b/common/content/liberator.js
@@ -1593,6 +1593,7 @@ const liberator = (function () //{{{
             }
 
             let flags = 0;
+            params = params || {};
             if (params instanceof Array)
                 params = { where: params };