diff --git a/helpers/postgresql.py b/helpers/postgresql.py
index ce6be64b..517f656b 100644
--- a/helpers/postgresql.py
+++ b/helpers/postgresql.py
@@ -147,7 +147,7 @@ class Postgresql:
         f.write("host replication %(username)s %(network)s md5" %
                 {"username": self.replication["username"], "network": self.replication["network"]})
         # allow TCP connections from the host's own address
-        f.write("\nhost postgres postgres %(network)s/32 trust\n" % {"network": self.host})
+        f.write("\nhost postgres postgres samehost trust\n" % {"network": self.host})
         f.close()
 
     def write_recovery_conf(self, leader_hash):