diff --git a/stack/erp5/buildout.hash.cfg b/stack/erp5/buildout.hash.cfg
index 016f38ee89285c3ad8522ab058014d370ac79651..1243530b1aa90d2a0e1958b6724f71f1de8e3dd2 100644
--- a/stack/erp5/buildout.hash.cfg
+++ b/stack/erp5/buildout.hash.cfg
@@ -50,7 +50,7 @@ md5sum = dec33a617fa1b307c8ddb883efcfe3ce
 
 [template-postfix]
 filename = instance-postfix.cfg.in
-md5sum = 805d997fcac266b0958c1c385729b32d
+md5sum = 56169f1a69fd99713e0fdef8ee14d25c
 
 [template-postfix-master-cf]
 filename = postfix_master.cf.in
diff --git a/stack/erp5/instance-postfix.cfg.in b/stack/erp5/instance-postfix.cfg.in
index 87d5243742eeda90cf84549ccbd38bf36d9f3e25..b58bc9f3d6e027ea0dce71ec4e40cf725350823d 100644
--- a/stack/erp5/instance-postfix.cfg.in
+++ b/stack/erp5/instance-postfix.cfg.in
@@ -35,6 +35,7 @@ etc-cyrus = ${:etc}/cyrus
 run = ${:etc}/run
 bin = ${buildout:directory}/bin
 usr = ${buildout:directory}/usr
+srv = ${buildout:directory}/srv
 var = ${buildout:directory}/var
 var-lib = ${:var}/lib
 var-lib-postfix = ${:var-lib}/postfix