diff --git a/backend/app/main.go b/backend/app/main.go
index 0e80e9ff..b0ee2da5 100644
--- a/backend/app/main.go
+++ b/backend/app/main.go
@@ -26,6 +26,8 @@ type Opts struct {
 
 var revision = "unknown"
 
+// CommonOptionsCommander extends flags.Commander with SetCommon
+// All commands should implement this interfaces
 type CommonOptionsCommander interface {
 	SetCommon(commonOpts cmd.CommonOpts)
 	Execute(args []string) error