diff --git a/lib/xmet/db.py b/lib/xmet/db.py
index 7f70d4f..aea54f7 100644
--- a/lib/xmet/db.py
+++ b/lib/xmet/db.py
@@ -206,7 +206,7 @@ class Database():
 
         self.db.execute(sql, values)
 
-    def query_sql(self, table, sql, values=list()):
+    def query_sql(self, table, sql, values):
         cr = DatabaseTableCursor(table, self.db.cursor())
         cr.execute(sql, values)