diff --git a/probe/kubernetes/reporter.go b/probe/kubernetes/reporter.go
index d9311a5da..45abeda2c 100644
--- a/probe/kubernetes/reporter.go
+++ b/probe/kubernetes/reporter.go
@@ -199,7 +199,7 @@ func (r *Reporter) Tag(rpt report.Report) (report.Report, error) {
 
 		rpt.Container.Nodes[id] = n.WithParents(report.MakeSets().Add(
 			report.Pod,
-			report.MakeStringSet().Add(report.MakePodNodeID(uid)),
+			report.MakeStringSet(report.MakePodNodeID(uid)),
 		))
 	}
 	return rpt, nil
diff --git a/render/container.go b/render/container.go
index 74f4e3d58..0df54da50 100644
--- a/render/container.go
+++ b/render/container.go
@@ -365,7 +365,7 @@ func MapContainerImage2Name(n report.Node, _ report.Networks) report.Nodes {
 	n.ID = report.MakeContainerImageNodeID(imageNameWithoutVersion)
 
 	if imageID, ok := report.ParseContainerImageNodeID(n.ID); ok {
-		n.Sets = n.Sets.Add(docker.ImageID, report.MakeStringSet().Add(imageID))
+		n.Sets = n.Sets.Add(docker.ImageID, report.MakeStringSet(imageID))
 	}
 
 	return report.Nodes{n.ID: n}