diff --git a/documentation/examples/prometheus-kubernetes.yml b/documentation/examples/prometheus-kubernetes.yml
index 1f91d36a9..893614e63 100644
--- a/documentation/examples/prometheus-kubernetes.yml
+++ b/documentation/examples/prometheus-kubernetes.yml
@@ -108,7 +108,7 @@ scrape_configs:
   - source_labels: [__address__, __meta_kubernetes_service_annotation_prometheus_io_port]
     action: replace
     target_label: __address__
-    regex: (.+)(?::\d+);(\d+)
+    regex: (.+)(?::\d+)?;(\d+)
     replacement: $1:$2
   - action: labelmap
     regex: __meta_kubernetes_service_label_(.+)
@@ -174,8 +174,8 @@ scrape_configs:
     regex: (.+)
   - source_labels: [__address__, __meta_kubernetes_pod_annotation_prometheus_io_port]
     action: replace
-    regex: (.+):(?:\d+);(\d+)
-    replacement: ${1}:${2}
+    regex: (.+)(?::\d+)?;(\d+)
+    replacement: $1:$2
     target_label: __address__
   - action: labelmap
     regex: __meta_kubernetes_pod_label_(.+)