diff --git a/os_net_config/impl_ifcfg.py b/os_net_config/impl_ifcfg.py
index e5f39b66..097552ad 100644
--- a/os_net_config/impl_ifcfg.py
+++ b/os_net_config/impl_ifcfg.py
@@ -72,6 +72,7 @@ class IfcfgNetConfig(os_net_config.NetConfig):
         data += "DEVICE=%s\n" % base_opt.name
         data += "ONBOOT=yes\n"
         data += "HOTPLUG=no\n"
+        data += "NM_CONTROLLED=no\n"
         if isinstance(base_opt, objects.Vlan):
             data += "VLAN=yes\n"
             if base_opt.device:
diff --git a/os_net_config/tests/test_impl_ifcfg.py b/os_net_config/tests/test_impl_ifcfg.py
index 5c733d85..f43faed8 100644
--- a/os_net_config/tests/test_impl_ifcfg.py
+++ b/os_net_config/tests/test_impl_ifcfg.py
@@ -29,6 +29,7 @@ _BASE_IFCFG = """# This file is autogenerated by os-net-config
 DEVICE=em1
 ONBOOT=yes
 HOTPLUG=no
+NM_CONTROLLED=no
 """
 
 _NO_IP = _BASE_IFCFG + "BOOTPROTO=none\n"
@@ -65,6 +66,7 @@ _OVS_BRIDGE_DHCP = """# This file is autogenerated by os-net-config
 DEVICE=br-ctlplane
 ONBOOT=yes
 HOTPLUG=no
+NM_CONTROLLED=no
 DEVICETYPE=ovs
 TYPE=OVSBridge
 OVSBOOTPROTO=dhcp
@@ -84,6 +86,7 @@ _BASE_VLAN = """# This file is autogenerated by os-net-config
 DEVICE=vlan5
 ONBOOT=yes
 HOTPLUG=no
+NM_CONTROLLED=no
 VLAN=yes
 PHYSDEV=em1
 """
@@ -107,6 +110,7 @@ _OVS_BOND_DHCP = """# This file is autogenerated by os-net-config
 DEVICE=bond0
 ONBOOT=yes
 HOTPLUG=no
+NM_CONTROLLED=no
 DEVICETYPE=ovs
 TYPE=OVSBond
 OVSBOOTPROTO=dhcp
@@ -254,6 +258,7 @@ class TestIfcfgNetConfig(base.TestCase):
 DEVICE=em2
 ONBOOT=yes
 HOTPLUG=no
+NM_CONTROLLED=no
 BOOTPROTO=none
 """
         self.assertEqual(em2_config, self.get_interface_config('em2'))
@@ -269,12 +274,14 @@ BOOTPROTO=none
 DEVICE=em1
 ONBOOT=yes
 HOTPLUG=no
+NM_CONTROLLED=no
 BOOTPROTO=none
 """
         em2_config = """# This file is autogenerated by os-net-config
 DEVICE=em2
 ONBOOT=yes
 HOTPLUG=no
+NM_CONTROLLED=no
 BOOTPROTO=none
 DEFROUTE=no
 """