diff --git a/heat/engine/resources/openstack/neutron/router.py b/heat/engine/resources/openstack/neutron/router.py
index 182fcc9d3d..15ab6a8678 100644
--- a/heat/engine/resources/openstack/neutron/router.py
+++ b/heat/engine/resources/openstack/neutron/router.py
@@ -334,7 +334,7 @@ class RouterInterface(neutron.NeutronResource):
         if value and deprecated_value:
             raise exception.ResourcePropertyConflict(key,
                                                      deprecated_key)
-        if not value and not deprecated_value:
+        if value is None and deprecated_value is None:
             return False
         return True
 
diff --git a/heat/tests/neutron/test_neutron_router.py b/heat/tests/neutron/test_neutron_router.py
index 232e421030..bd60134573 100644
--- a/heat/tests/neutron/test_neutron_router.py
+++ b/heat/tests/neutron/test_neutron_router.py
@@ -21,6 +21,7 @@ import six
 
 from heat.common import exception
 from heat.common import template_format
+from heat.engine import properties
 from heat.engine.resources.openstack.neutron import router
 from heat.engine import rsrc_defn
 from heat.engine import scheduler
@@ -864,3 +865,30 @@ class NeutronRouterTest(common.HeatTestCase):
         rsrc = self.create_router(t, stack, 'router')
         self.assertIsNone(scheduler.TaskRunner(rsrc.delete)())
         self.m.VerifyAll()
+
+    def test_validate_depr_keys_required_both(self):
+        data = {'router_id': '1234',
+                'router': 'abc'}
+        p = properties.Properties(router.RouterInterface.properties_schema,
+                                  data)
+        self.assertRaises(
+            exception.ResourcePropertyConflict,
+            router.RouterInterface._validate_deprecated_keys,
+            p, 'router', 'router_id')
+
+    def test_validate_depr_keys_required_neither(self):
+        data = {}
+        p = properties.Properties(router.RouterInterface.properties_schema,
+                                  data)
+
+        res = router.RouterInterface._validate_deprecated_keys(
+            p, 'router', 'router_id')
+        self.assertFalse(res)
+
+    def test_validate_depr_keys_required_one(self):
+        data = {'router_id': ''}
+        p = properties.Properties(router.RouterInterface.properties_schema,
+                                  data)
+        res = router.RouterInterface._validate_deprecated_keys(
+            p, 'router', 'router_id')
+        self.assertTrue(res)