diff --git a/bind.spec b/bind.spec
index 64688c0..0d869f1 100644
--- a/bind.spec
+++ b/bind.spec
@@ -26,7 +26,7 @@ Summary:  The Berkeley Internet Name Domain (BIND) DNS (Domain Name System) serv
 Name:     bind
 License:  MPLv2.0
 Version:  9.11.1
-Release:  3%{?PATCHVER:.%{PATCHVER}}%{?PREVER:.%{PREVER}}%{?dist}
+Release:  4%{?PATCHVER:.%{PATCHVER}}%{?PREVER:.%{PREVER}}%{?dist}
 Epoch:    32
 Url:      http://www.isc.org/products/BIND/
 Buildroot:%{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
@@ -1135,6 +1135,9 @@ rm -rf ${RPM_BUILD_ROOT}
 %{python3_sitelib}/isc/__pycache__/*py*
 
 %changelog
+* Fri Jul 14 2017 Petr Menšík <pemensik@redhat.com> - 32:9.11.1-4.P3
+- Simplify change of default configuration file path
+
 * Thu Jul 13 2017 Petr Menšík <pemensik@redhat.com> - 32:9.11.1-3.P3
 - Use mysql_config for SDB variant, build against mariadb-devel
 
diff --git a/named-chroot.service b/named-chroot.service
index a015168..5732b1c 100644
--- a/named-chroot.service
+++ b/named-chroot.service
@@ -12,12 +12,13 @@ After=network.target
 
 [Service]
 Type=forking
+Environment=NAMEDCONF=/etc/named.conf
 EnvironmentFile=-/etc/sysconfig/named
 Environment=KRB5_KTNAME=/etc/named.keytab
 PIDFile=/var/named/chroot/run/named/named.pid
 
-ExecStartPre=/bin/bash -c 'if [ ! "$DISABLE_ZONE_CHECKING" == "yes" ]; then /usr/sbin/named-checkconf -t /var/named/chroot -z /etc/named.conf; else echo "Checking of zone files is disabled"; fi'
-ExecStart=/usr/sbin/named -u named -t /var/named/chroot $OPTIONS
+ExecStartPre=/bin/bash -c 'if [ ! "$DISABLE_ZONE_CHECKING" == "yes" ]; then /usr/sbin/named-checkconf -t /var/named/chroot -z "$NAMEDCONF"; else echo "Checking of zone files is disabled"; fi'
+ExecStart=/usr/sbin/named -u named -c ${NAMEDCONF} -t /var/named/chroot $OPTIONS
 
 ExecReload=/bin/sh -c '/usr/sbin/rndc reload > /dev/null 2>&1 || /bin/kill -HUP $MAINPID'
 
diff --git a/named-pkcs11.service b/named-pkcs11.service
index e522ec3..c1a19d1 100644
--- a/named-pkcs11.service
+++ b/named-pkcs11.service
@@ -8,12 +8,13 @@ After=named-setup-rndc.service
 
 [Service]
 Type=forking
+Environment=NAMEDCONF=/etc/named.conf
 EnvironmentFile=-/etc/sysconfig/named
 Environment=KRB5_KTNAME=/etc/named.keytab
 PIDFile=/run/named/named.pid
 
-ExecStartPre=/bin/bash -c 'if [ ! "$DISABLE_ZONE_CHECKING" == "yes" ]; then /usr/sbin/named-checkconf -z /etc/named.conf; else echo "Checking of zone files is disabled"; fi'
-ExecStart=/usr/sbin/named-pkcs11 -u named $OPTIONS
+ExecStartPre=/bin/bash -c 'if [ ! "$DISABLE_ZONE_CHECKING" == "yes" ]; then /usr/sbin/named-checkconf -z "$NAMEDCONF"; else echo "Checking of zone files is disabled"; fi'
+ExecStart=/usr/sbin/named-pkcs11 -u named -c ${NAMEDCONF} $OPTIONS
 
 ExecReload=/bin/sh -c '/usr/sbin/rndc reload > /dev/null 2>&1 || /bin/kill -HUP $MAINPID'
 
diff --git a/named-sdb-chroot.service b/named-sdb-chroot.service
index 0cc0c31..5294f47 100644
--- a/named-sdb-chroot.service
+++ b/named-sdb-chroot.service
@@ -12,12 +12,13 @@ After=network.target
 
 [Service]
 Type=forking
+Environment=NAMEDCONF=/etc/named.conf
 EnvironmentFile=-/etc/sysconfig/named
 Environment=KRB5_KTNAME=/etc/named.keytab
 PIDFile=/var/named/chroot_sdb/run/named/named.pid
 
-ExecStartPre=/bin/bash -c 'if [ ! "$DISABLE_ZONE_CHECKING" == "yes" ]; then /usr/sbin/named-checkconf -t /var/named/chroot_sdb -z /etc/named.conf; else echo "Checking of zone files is disabled"; fi'
-ExecStart=/usr/sbin/named-sdb -u named -t /var/named/chroot_sdb $OPTIONS
+ExecStartPre=/bin/bash -c 'if [ ! "$DISABLE_ZONE_CHECKING" == "yes" ]; then /usr/sbin/named-checkconf -t /var/named/chroot_sdb -z "$NAMEDCONF"; else echo "Checking of zone files is disabled"; fi'
+ExecStart=/usr/sbin/named-sdb -u named -c ${NAMEDCONF} -t /var/named/chroot_sdb $OPTIONS
 
 ExecReload=/bin/sh -c '/usr/sbin/rndc reload > /dev/null 2>&1 || /bin/kill -HUP $MAINPID'
 
diff --git a/named-sdb.service b/named-sdb.service
index 530156d..b80ec17 100644
--- a/named-sdb.service
+++ b/named-sdb.service
@@ -8,12 +8,13 @@ After=network.target
 
 [Service]
 Type=forking
+Environment=NAMEDCONF=/etc/named.conf
 EnvironmentFile=-/etc/sysconfig/named
 Environment=KRB5_KTNAME=/etc/named.keytab
 PIDFile=/run/named/named.pid
 
-ExecStartPre=/bin/bash -c 'if [ ! "$DISABLE_ZONE_CHECKING" == "yes" ]; then /usr/sbin/named-checkconf -z /etc/named.conf; else echo "Checking of zone files is disabled"; fi'
-ExecStart=/usr/sbin/named-sdb -u named $OPTIONS
+ExecStartPre=/bin/bash -c 'if [ ! "$DISABLE_ZONE_CHECKING" == "yes" ]; then /usr/sbin/named-checkconf -z "$NAMEDCONF"; else echo "Checking of zone files is disabled"; fi'
+ExecStart=/usr/sbin/named-sdb -u named -c ${NAMEDCONF} $OPTIONS
 
 ExecReload=/bin/sh -c '/usr/sbin/rndc reload > /dev/null 2>&1 || /bin/kill -HUP $MAINPID'
 
diff --git a/named.service b/named.service
index bbacf75..6a162ad 100644
--- a/named.service
+++ b/named.service
@@ -8,12 +8,13 @@ After=network.target
 
 [Service]
 Type=forking
+Environment=NAMEDCONF=/etc/named.conf
 EnvironmentFile=-/etc/sysconfig/named
 Environment=KRB5_KTNAME=/etc/named.keytab
 PIDFile=/run/named/named.pid
 
-ExecStartPre=/bin/bash -c 'if [ ! "$DISABLE_ZONE_CHECKING" == "yes" ]; then /usr/sbin/named-checkconf -z /etc/named.conf; else echo "Checking of zone files is disabled"; fi'
-ExecStart=/usr/sbin/named -u named $OPTIONS
+ExecStartPre=/bin/bash -c 'if [ ! "$DISABLE_ZONE_CHECKING" == "yes" ]; then /usr/sbin/named-checkconf -z "$NAMEDCONF"; else echo "Checking of zone files is disabled"; fi'
+ExecStart=/usr/sbin/named -u named -c ${NAMEDCONF} $OPTIONS
 
 ExecReload=/bin/sh -c '/usr/sbin/rndc reload > /dev/null 2>&1 || /bin/kill -HUP $MAINPID'
 
diff --git a/named.sysconfig b/named.sysconfig
index 2326043..5f6f817 100644
--- a/named.sysconfig
+++ b/named.sysconfig
@@ -5,6 +5,11 @@
 #                            at startup. Don't add -t here, enable proper
 #                            -chroot.service unit file.
 #
+# NAMEDCONF=/etc/named/alternate.conf
+#                        --  Don't use -c to change configuration file.
+#                            Extend systemd named.service instead or use this
+#                            variable.
+#
 # DISABLE_ZONE_CHECKING  --  By default, service file calls named-checkzone
 #                            utility for every zone to ensure all zones are
 #                            valid before named starts. If you set this option