diff --git a/postfix.spec b/postfix.spec
index 8b74c31..b02e24a 100644
--- a/postfix.spec
+++ b/postfix.spec
@@ -9,7 +9,7 @@
 
 Name:          postfix
 Version:       2.11.3
-Release:       4mamba
+Release:       5mamba
 Summary:       A fast, easy to administer, and secure mail transfer agent
 Group:         System/Servers
 Vendor:        openmamba
@@ -78,7 +78,7 @@ sh ./postfix-install \
    install_root=%{buildroot} \
    -non-interactive
 
-install -D -m0755 %{SOURCE1} %{buildroot}%{_unitdir}/postfix.service
+install -D -m0644 %{SOURCE1} %{buildroot}%{_unitdir}/postfix.service
 
 mv %{buildroot}%{_sysconfdir}/postfix/aliases %{buildroot}%{_sysconfdir}/
 
@@ -302,6 +302,9 @@ exit 0
 %attr(0771,vmail,vmail) %dir %{_localstatedir}/spool/deleted-maildirs
 
 %changelog
+* Thu Jan 22 2015 Silvan Calarco <silvan.calarco@mambasoft.it> 2.11.3-5mamba
+- fix permissions of postfix.service
+
 * Sat Jan 17 2015 Silvan Calarco <silvan.calarco@mambasoft.it> 2.11.3-4mamba
 - grant ALTER permission to postifx database user required by postfixadmin