Delete default sec group
diff --git a/openstack/compute/v2/extensions/defsecrules/requests.go b/openstack/compute/v2/extensions/defsecrules/requests.go
index 7d304de..f324a00 100644
--- a/openstack/compute/v2/extensions/defsecrules/requests.go
+++ b/openstack/compute/v2/extensions/defsecrules/requests.go
@@ -96,3 +96,15 @@
 
 	return result
 }
+
+// Delete will permanently delete a default rule from the project.
+func Delete(client *gophercloud.ServiceClient, id string) gophercloud.ErrResult {
+	var result gophercloud.ErrResult
+
+	_, result.Err = perigee.Request("DELETE", resourceURL(client, id), perigee.Options{
+		MoreHeaders: client.AuthenticatedHeaders(),
+		OkCodes:     []int{202},
+	})
+
+	return result
+}