diff --git a/retrieval/discovery/marathon/constants.go b/retrieval/discovery/marathon/constants.go
index 41764cc3f..f9298d7be 100644
--- a/retrieval/discovery/marathon/constants.go
+++ b/retrieval/discovery/marathon/constants.go
@@ -10,10 +10,10 @@ const (
 	// appLabelPrefix is the prefix for the application labels.
 	appLabelPrefix = metaLabelPrefix + "app_label_"
 
-	// AppLabel is used for the name of the app in Marathon.
+	// appLabel is used for the name of the app in Marathon.
 	appLabel clientmodel.LabelName = metaLabelPrefix + "app"
-	// ImageLabel is the label that is used for the docker image running the service.
+	// imageLabel is the label that is used for the docker image running the service.
 	imageLabel clientmodel.LabelName = metaLabelPrefix + "image"
-	// TaskLabel contains the mesos task name of the app instance.
+	// taskLabel contains the mesos task name of the app instance.
 	taskLabel clientmodel.LabelName = metaLabelPrefix + "task"
 )