diff -r 211472ab15c8 -r a8c1ea390400 cubicweb/server/querier.py
--- a/cubicweb/server/querier.py	Thu Mar 14 14:45:35 2019 +0100
+++ b/cubicweb/server/querier.py	Thu Mar 14 12:08:37 2019 +0100
@@ -45,9 +45,9 @@
 ETYPE_PYOBJ_MAP[Binary] = 'Bytes'
 
 
-def empty_rset(rql, args, rqlst=None):
+def empty_rset(rql, args):
     """build an empty result set object"""
-    return ResultSet([], rql, args, rqlst=rqlst)
+    return ResultSet([], rql, args)
 
 
 # permission utilities ########################################################