diff --git a/12-dhcpd b/12-dhcpd
index e72e8cd..2757988 100644
--- a/12-dhcpd
+++ b/12-dhcpd
@@ -1,31 +1,11 @@
 #!/bin/bash
 export LC_ALL=C
 
-[ -f /etc/sysconfig/dhcpd ] && . /etc/sysconfig/dhcpd
-
 # restart dhcpd whenever $1 interface is brought up by NM (rhbz #565921)
 if [ "$2" = "up" ]; then
     # exit if the service is not configured to be started in the current runlevel
     /bin/systemctl is-enabled dhcpd.service || exit 0
 
-    ifaces=""                # interfaces defined in DHCPDARGS
-    net=$(ls /sys/class/net) # all interfaces on system
-
-    if [ -n "${DHCPDARGS}" ]; then
-        for iface in ${net}; do
-            for arg in ${DHCPDARGS}; do
-                [ $arg == $iface ] && ifaces="$ifaces $iface"
-            done
-        done
-    fi
-
-    # exit if dhcpd is not defined to listen on $1
-    # i.e. if there are interfaces defined in DHCPDARGS and $1 is not among them
-    if [ -n "${ifaces}" ] &&
-       [[ "${ifaces}" != *$1* ]]; then
-          exit 0
-    fi
-
     # restart service
     /bin/systemctl restart dhcpd.service || :
 fi
diff --git a/dhcp.spec b/dhcp.spec
index a2ee27e..b167ca1 100644
--- a/dhcp.spec
+++ b/dhcp.spec
@@ -18,7 +18,7 @@
 Summary:  Dynamic host configuration protocol software
 Name:     dhcp
 Version:  4.2.4
-Release:  13.%{patchver}%{?dist}
+Release:  14.%{patchver}%{?dist}
 # NEVER CHANGE THE EPOCH on this package.  The previous maintainer (prior to
 # dcantrell maintaining the package) made incorrect use of the epoch and
 # that's why it is at 12 now.  It should have never been used, but it was.
@@ -418,27 +418,6 @@ touch %{buildroot}%{_localstatedir}/lib/dhcpd/dhcpd.leases
 touch %{buildroot}%{_localstatedir}/lib/dhcpd/dhcpd6.leases
 %{__mkdir} -p %{buildroot}%{_localstatedir}/lib/dhclient/
 
-# Create default sysconfig files for dhcpd and dhcrelay
-%{__mkdir} -p %{buildroot}%{_sysconfdir}/sysconfig
-
-%{__cat} << EOF > %{buildroot}%{_sysconfdir}/sysconfig/dhcrelay
-# Command line options here
-#Example: DHCRELAYARGS="-4 -i eth0 192.168.0.1"
-#Example: DHCRELAYARGS="-6 -l eth1 -u eth0"
-DHCRELAYARGS=""
-# Note: We don't use INTERFACES and DHCPSERVERS anymore (they were DHCPv4 only)
-EOF
-
-%{__cat} <<EOF > %{buildroot}%{_sysconfdir}/sysconfig/dhcpd
-# Command line options here
-DHCPDARGS=""
-EOF
-
-%{__cat} <<EOF > %{buildroot}%{_sysconfdir}/sysconfig/dhcpd6
-# Command line options here
-DHCPDARGS=""
-EOF
-
 # Copy sample conf files into position (called by doc macro)
 %{__cp} -p client/dhclient.conf dhclient.conf.sample
 %{__cp} -p server/dhcpd.conf dhcpd.conf.sample
@@ -523,9 +502,6 @@ fi
 %attr(0755,dhcpd,dhcpd) %dir %{_localstatedir}/lib/dhcpd
 %attr(0644,dhcpd,dhcpd) %verify(mode) %config(noreplace) %{_localstatedir}/lib/dhcpd/dhcpd.leases
 %attr(0644,dhcpd,dhcpd) %verify(mode) %config(noreplace) %{_localstatedir}/lib/dhcpd/dhcpd6.leases
-%config(noreplace) %{_sysconfdir}/sysconfig/dhcpd
-%config(noreplace) %{_sysconfdir}/sysconfig/dhcpd6
-%config(noreplace) %{_sysconfdir}/sysconfig/dhcrelay
 %config(noreplace) %{dhcpconfdir}/dhcpd.conf
 %config(noreplace) %{dhcpconfdir}/dhcpd6.conf
 %config(noreplace) %{_sysconfdir}/openldap/schema/dhcp.schema
@@ -583,6 +559,10 @@ fi
 
 
 %changelog
+* Fri Aug 24 2012 Tomas Hozza <thozza@redhat.com> - 12:4.2.4-14.P1
+- SystemD unit files don't use Environment files any more (#850558)
+- NetworkManager dispatcher script doesn't use DHCPDARGS any more 
+
 * Wed Aug 22 2012 Tomas Hozza <thozza@redhat.com> - 12:4.2.4-13.P1
 - fixed SPEC file so it comply with new systemd-rpm macros guidelines (#850089)
 
diff --git a/dhcpd.service b/dhcpd.service
index a4251d4..ad7ab4f 100644
--- a/dhcpd.service
+++ b/dhcpd.service
@@ -4,8 +4,7 @@ Documentation=man:dhcpd(8) man:dhcpd.conf(5)
 After=network.target
 
 [Service]
-EnvironmentFile=/etc/sysconfig/dhcpd
-ExecStart=/usr/sbin/dhcpd -f -cf /etc/dhcp/dhcpd.conf -user dhcpd -group dhcpd --no-pid $DHCPDARGS
+ExecStart=/usr/sbin/dhcpd -f -cf /etc/dhcp/dhcpd.conf -user dhcpd -group dhcpd --no-pid
 
 [Install]
 WantedBy=multi-user.target
diff --git a/dhcpd6.service b/dhcpd6.service
index 4f48dd0..72e7f89 100644
--- a/dhcpd6.service
+++ b/dhcpd6.service
@@ -4,8 +4,7 @@ Documentation=man:dhcpd(8) man:dhcpd.conf(5)
 After=network.target
 
 [Service]
-EnvironmentFile=/etc/sysconfig/dhcpd6
-ExecStart=/usr/sbin/dhcpd -f -6 -cf /etc/dhcp/dhcpd6.conf -user dhcpd -group dhcpd --no-pid $DHCPDARGS
+ExecStart=/usr/sbin/dhcpd -f -6 -cf /etc/dhcp/dhcpd6.conf -user dhcpd -group dhcpd --no-pid
 
 [Install]
 WantedBy=multi-user.target
diff --git a/dhcrelay.service b/dhcrelay.service
index 9302900..178d5b4 100644
--- a/dhcrelay.service
+++ b/dhcrelay.service
@@ -4,8 +4,7 @@ Documentation=man:dhcrelay(8)
 After=network.target
 
 [Service]
-EnvironmentFile=/etc/sysconfig/dhcrelay
-ExecStart=/usr/sbin/dhcrelay -d --no-pid $DHCRELAYARGS
+ExecStart=/usr/sbin/dhcrelay -d --no-pid
 
 [Install]
 WantedBy=multi-user.target