diff --git a/openerp/addons/base/test/test_osv_expression.yml b/openerp/addons/base/test/test_osv_expression.yml
index a372c5952a3..bad5ad0f611 100644
--- a/openerp/addons/base/test/test_osv_expression.yml
+++ b/openerp/addons/base/test/test_osv_expression.yml
@@ -177,6 +177,23 @@
         res_ids = self.search(cr, uid, [('company_id.partner_id', 'not in', [])])
         res_ids.sort()
         assert res_ids == all_ids, "Searching against empty set failed, returns %r" % res_ids
+-
+    Property of the query (one2many not in False).
+-
+    !python {model: res.currency }: |
+        ids = self.search(cr, uid, [])
+        referenced_companies = set([x.company_id.id for x in self.browse(cr, uid, ids)])
+        companies = set(self.pool.get('res.company').search(cr, uid, [('currency_ids', 'not in', False)]))
+        assert referenced_companies == companies
+-
+    Property of the query (one2many in False).
+-
+    !python {model: res.currency }: |
+        ids = self.search(cr, uid, [])
+        referenced_companies = set([x.company_id.id for x in self.browse(cr, uid, ids)])
+        unreferenced_companies = set(self.pool.get('res.company').search(cr, uid, [])).difference(referenced_companies)
+        companies = set(self.pool.get('res.company').search(cr, uid, [('currency_ids', 'in', False)]))
+        assert unreferenced_companies == companies
 -
     Equivalent queries.
 -
@@ -274,11 +291,9 @@
         assert res_9 == []
         print ">>> 10:", res_10
         print ">>> 11:", res_11
-        print ">>> 12:", res_12
-        print ">>> 13:", res_13
         #assert res_10 == res_11
-        #assert res_10 == res_12
-        #assert res_10 == res_13
+        assert res_10 == res_12
+        assert res_10 == res_13
 
         # child_of x returns x and its children (direct or not).
         company = self.browse(cr, uid, ref('ymltest_company3'))
diff --git a/openerp/osv/expression.py b/openerp/osv/expression.py
index 1b387174857..c645b35589f 100644
--- a/openerp/osv/expression.py
+++ b/openerp/osv/expression.py
@@ -293,8 +293,6 @@ class expression(object):
                                 #no result found with given search criteria
                                 call_null = False
                                 self.__exp[i] = FALSE_LEAF
-                            else:
-                                operator = 'in' # operator changed because ids are directly related to main object
                         else:
                             call_null = False
                             o2m_op = 'in'