diff --git a/controller/nucleus/principalNetworkDomain.go b/controller/nucleus/principalNetworkDomain.go
index b9ba3472bd1763c73fdab87e8f325b41e22b6fdb..4aaf2cfc3a263f65e84bf113a368d7cb83fe2108 100644
--- a/controller/nucleus/principalNetworkDomain.go
+++ b/controller/nucleus/principalNetworkDomain.go
@@ -408,7 +408,7 @@ func (pnd *pndImplementation) MarshalNetworkElement(identifier string) (string,
 
 // Request sends a get request to a specific network element.
 // TODO: this method needs some heavy refactoring, especially in regards to the
-// UpdateModel call
+// UpdateModel call.
 func (pnd *pndImplementation) Request(uuid uuid.UUID, path string) (proto.Message, error) {
 	mne, err := pnd.networkElementService.Get(store.Query{
 		ID:   uuid,