diff --git a/postfix.changes b/postfix.changes
index 17af5ed..8a8692a 100644
--- a/postfix.changes
+++ b/postfix.changes
@@ -1,3 +1,10 @@
+-------------------------------------------------------------------
+Sat Feb 18 14:01:35 UTC 2017 - kukuk@suse.com
+
+- Fix requires:
+  - shadow is needed for postfix-mysql pre-install section
+  - insserv is not needed if systemd is used
+
 -------------------------------------------------------------------
 Sat Jan 21 23:27:34 UTC 2017 - chris@computersalat.de
 
diff --git a/postfix.spec b/postfix.spec
index 159a9ae..86a8f3e 100644
--- a/postfix.spec
+++ b/postfix.spec
@@ -94,7 +94,6 @@ BuildRequires:  pkgconfig
 BuildRequires:  postgresql-devel
 Requires:       iproute2
 Requires(pre):  permissions
-Requires(pre):  %insserv_prereq
 Requires(pre):  %fillup_prereq
 Provides:       smtp_daemon
 BuildRoot:      %{_tmppath}/%{name}-%{version}-build
@@ -110,7 +109,7 @@ BuildRequires:  fdupes
 BuildRequires:  systemd
 %{?systemd_requires}
 %else
-Requires(pre):  %insserv_prereq %fillup_prereq
+Requires(pre):  %insserv_prereq
 Requires(pre):  %{_bindir}/getent
 Requires(pre):  pwdutils
 Requires(pre):  /bin/awk
@@ -149,6 +148,7 @@ This package contains the documentation for %{name}
 Summary:        Postfix plugin to support MySQL maps
 Group:          Productivity/Networking/Email/Servers
 Requires(pre): %{name} = %{version}
+Requires(pre): shadow
 
 %description mysql
 Postfix plugin to support MySQL maps. This library will be loaded by
@@ -517,10 +517,11 @@ fi
 # ---------------------------------------------------------------------------
 
 %postun
-%restart_on_update %{name}
-%insserv_cleanup
 %if 0%{?suse_version} > 1210
 %service_del_postun %{name}.service
+%else
+%restart_on_update %{name}
+%insserv_cleanup
 %endif
 /sbin/ldconfig