diff --git a/postgres/defaults.yaml b/postgres/defaults.yaml
index f84ba3d..7d14a91 100644
--- a/postgres/defaults.yaml
+++ b/postgres/defaults.yaml
@@ -47,6 +47,11 @@ postgres:
     - ['host', 'all', 'all', '127.0.0.1/32', 'md5']
     # IPv6 local connections:
     - ['host', 'all', 'all', '::1/128', 'md5']
+    # Allow replication connections from localhost, by a user with the
+    # replication privilege.
+    - ['local', 'replication', 'all', 'peer']
+    - ['host', 'replication', 'all', '127.0.0.1/32', 'md5']
+    - ['host', 'replication', 'all', '::1/128', 'md5']
 
   pg_ident.conf: salt://postgres/templates/pg_ident.conf.j2
   identity_map: []