diff --git a/commission.py b/commission.py
index c232a6c6d1..6c38a34597 100644
--- a/commission.py
+++ b/commission.py
@@ -64,7 +64,11 @@ class Agent(ModelSQL, ModelView):
 
     @classmethod
     def search_rec_name(cls, name, clause):
-        return ['OR',
+        if clause[1].startswith('!') or clause[1].startswith('not '):
+            bool_op = 'AND'
+        else:
+            bool_op = 'OR'
+        return [bool_op,
             ('party',) + tuple(clause[1:]),
             ('plan',) + tuple(clause[1:]),
             ]