diff --git a/networking_l2gw/extensions/l2gateway.py b/networking_l2gw/extensions/l2gateway.py
index c05edb1..a425bfb 100644
--- a/networking_l2gw/extensions/l2gateway.py
+++ b/networking_l2gw/extensions/l2gateway.py
@@ -61,11 +61,6 @@ class L2gateway(extensions.ExtensionDescriptor):
     def get_description(cls):
         return "Connects Neutron networks with external networks at layer 2."
 
-    @classmethod
-    def get_namespace(cls):
-        return "https://review.openstack.org/#/c/144173/3/specs/kilo/"
-    "l2-gateway-api.rst"
-
     @classmethod
     def get_updated(cls):
         return "2015-01-01T00:00:00-00:00"
diff --git a/networking_l2gw/extensions/l2gatewayconnection.py b/networking_l2gw/extensions/l2gatewayconnection.py
index 80735eb..d572f74 100644
--- a/networking_l2gw/extensions/l2gatewayconnection.py
+++ b/networking_l2gw/extensions/l2gatewayconnection.py
@@ -58,11 +58,6 @@ class L2gatewayconnection(extensions.ExtensionDescriptor):
     def get_description(cls):
         return "Connects Neutron networks with external networks at layer 2."
 
-    @classmethod
-    def get_namespace(cls):
-        return "https://review.openstack.org/#/c/144173/3/specs/kilo/"
-        "l2-gateway-api.rst"
-
     @classmethod
     def get_updated(cls):
         return "2014-01-01T00:00:00-00:00"