diff --git a/ud/manager.go b/ud/manager.go
index 010b7d5aa079b622b53fa374d75f6474c975d08b..0b7300105f2954a081fa6a7dfa35ca4f8a960be3 100644
--- a/ud/manager.go
+++ b/ud/manager.go
@@ -38,7 +38,8 @@ type Manager struct {
 	// This information is specified in Manager's constructors (NewOrLoad and NewManagerFromBackup).
 	ud *userDiscovery
 
-	//
+	// nameService adheres to the channels.NameService interface. This is
+	// implemented using the clientIDTracker.
 	nameService *clientIDTracker
 }