diff --git a/bin/osv/fields.py b/bin/osv/fields.py
index 8ecdd8eb407..432f5cde680 100644
--- a/bin/osv/fields.py
+++ b/bin/osv/fields.py
@@ -508,7 +508,7 @@ class many2many(_column):
 
         d1, d2, tables = obj.pool.get('ir.rule').domain_get(cr, user, obj._name, context=context)
         if d1:
-            d1 = ' and ' + d1
+            d1 = ' and ' + ' and '.join(d1)
 
         cr.execute('SELECT '+self._rel+'.'+self._id2+','+self._rel+'.'+self._id1+' \
                 FROM '+self._rel+' , '+(','.join(tables))+' \
@@ -546,7 +546,7 @@ class many2many(_column):
 
                 d1, d2,tables = obj.pool.get('ir.rule').domain_get(cr, user, obj._name, context=context)
                 if d1:
-                    d1 = ' and ' + d1
+                    d1 = ' and ' + ' and '.join(d1)
                 cr.execute('delete from '+self._rel+' where '+self._id1+'=%s AND '+self._id2+' IN (SELECT '+self._rel+'.'+self._id2+' FROM '+self._rel+', '+','.join(tables)+' WHERE '+self._rel+'.'+self._id1+'=%s AND '+self._rel+'.'+self._id2+' = '+obj._table+'.id '+ d1 +')', [id, id]+d2)
 
                 for act_nbr in act[2]: