diff --git a/lib/promscrape/discovery/kubernetes/common_types.go b/lib/promscrape/discovery/kubernetes/common_types.go
index 12de389628..d1bc212034 100644
--- a/lib/promscrape/discovery/kubernetes/common_types.go
+++ b/lib/promscrape/discovery/kubernetes/common_types.go
@@ -22,13 +22,13 @@ type ObjectMeta struct {
 func (om *ObjectMeta) registerLabelsAndAnnotations(prefix string, m map[string]string) {
 	for _, lb := range om.Labels {
 		ln := discoveryutils.SanitizeLabelName(lb.Name)
-		m[prefix + "_label_" + ln] = lb.Value
-		m[prefix + "_labelpresent_" + ln] = "true"
+		m[prefix+"_label_"+ln] = lb.Value
+		m[prefix+"_labelpresent_"+ln] = "true"
 	}
 	for _, a := range om.Annotations {
 		an := discoveryutils.SanitizeLabelName(a.Name)
-		m[prefix + "_annotation_" + an] = a.Value
-		m[prefix + "_annotationpresent_" + an] = "true"
+		m[prefix+"_annotation_"+an] = a.Value
+		m[prefix+"_annotationpresent_"+an] = "true"
 	}
 }
 
diff --git a/lib/promscrape/discovery/kubernetes/node.go b/lib/promscrape/discovery/kubernetes/node.go
index 02ba6b2564..9a584c67e3 100644
--- a/lib/promscrape/discovery/kubernetes/node.go
+++ b/lib/promscrape/discovery/kubernetes/node.go
@@ -95,7 +95,7 @@ func (n *Node) appendTargetLabels(ms []map[string]string) []map[string]string {
 		}
 		addrTypesUsed[a.Type] = true
 		ln := discoveryutils.SanitizeLabelName(a.Type)
-		m["__meta_kubernetes_node_address_" + ln] = a.Address
+		m["__meta_kubernetes_node_address_"+ln] = a.Address
 	}
 	ms = append(ms, m)
 	return ms