diff --git a/hack/charts/cluster-api-operator/values.yaml b/hack/charts/cluster-api-operator/values.yaml
index 69c98f28..7038e9b6 100644
--- a/hack/charts/cluster-api-operator/values.yaml
+++ b/hack/charts/cluster-api-operator/values.yaml
@@ -24,7 +24,7 @@ image:
 env:
   manager: []
 healthAddr: ":8081"
-diagnosticsAddress: "8443"
+diagnosticsAddress: ":8443"
 insecureDiagnostics: false
 watchConfigSecret: false
 imagePullSecrets: {}
diff --git a/test/e2e/resources/full-chart-install.yaml b/test/e2e/resources/full-chart-install.yaml
index 37c0d9b4..f51b0082 100644
--- a/test/e2e/resources/full-chart-install.yaml
+++ b/test/e2e/resources/full-chart-install.yaml
@@ -28387,7 +28387,7 @@ spec:
       - args:
         - --v=2
         - --health-addr=:8081
-        - --diagnostics-address=8443
+        - --diagnostics-address=:8443
         - --leader-elect=true
         command:
         - /manager