diff --git a/src/sonic-config-engine/minigraph.py b/src/sonic-config-engine/minigraph.py
index 0dc3085e1294..23d02a363e47 100644
--- a/src/sonic-config-engine/minigraph.py
+++ b/src/sonic-config-engine/minigraph.py
@@ -202,15 +202,14 @@ def parse_dpg(dpg, hname):
             if acl_intfs:
                 acls[aclname] = {'policy_desc': aclname,
                                  'ports': acl_intfs,
-                                 'type': 'MIRROR' if is_mirror else 'L3',
-                                 'service': 'N/A'}
+                                 'type': 'MIRROR' if is_mirror else 'L3'}
             else:
                 # This ACL has no interfaces to attach to -- consider this a control plane ACL
                 aclservice = aclintf.find(str(QName(ns, "Type"))).text
                 acls[aclname] = {'policy_desc': aclname,
                                  'ports': acl_intfs,
                                  'type': 'CTRLPLANE',
-                                 'service': aclservice if aclservice is not None else ''}
+                                 'service': aclservice if aclservice is not None else 'UNKNOWN'}
         return intfs, lo_intfs, mgmt_intf, vlans, vlan_members, pcs, acls
     return None, None, None, None, None, None, None
 
diff --git a/src/sonic-config-engine/tests/test_cfggen.py b/src/sonic-config-engine/tests/test_cfggen.py
index 768052a1d7e2..2eee6fe331c8 100644
--- a/src/sonic-config-engine/tests/test_cfggen.py
+++ b/src/sonic-config-engine/tests/test_cfggen.py
@@ -73,7 +73,7 @@ def test_render_template(self):
     def test_minigraph_acl(self):
         argument = '-m "' + self.sample_graph_t0 + '" -p "' + self.port_config + '" -v ACL_TABLE'
         output = self.run_script(argument)
-        self.assertEqual(output.strip(), "{'DATAACL': {'type': 'L3', 'policy_desc': 'DATAACL', 'service': 'N/A', 'ports': ['Ethernet112', 'Ethernet116', 'Ethernet120', 'Ethernet124']}}")
+        self.assertEqual(output.strip(), "{'DATAACL': {'type': 'L3', 'policy_desc': 'DATAACL', 'ports': ['Ethernet112', 'Ethernet116', 'Ethernet120', 'Ethernet124']}}")
 
     def test_minigraph_everflow(self):
         argument = '-m "' + self.sample_graph_t0 + '" -p "' + self.port_config + '" -v MIRROR_SESSION'