diff --git a/docs/flags.md b/docs/flags.md
index 06af52774..b9adbb5ab 100644
--- a/docs/flags.md
+++ b/docs/flags.md
@@ -19,7 +19,7 @@
 | `--skipper-routegroup-groupversion="zalando.org/v1"` | The resource version for skipper routegroup |
 | `--[no-]always-publish-not-ready-addresses` | Always publish also not ready addresses for headless services (optional) |
 | `--annotation-filter=""` | Filter resources queried for endpoints by annotation, using label selector semantics |
-| `--[no-]combine-fqdn-annotation` | Combine FQDN template and Annotations instead of overwriting |
+| `--[no-]combine-fqdn-annotation` | Combine FQDN template and Annotations instead of overwriting (default: false) |
 | `--compatibility=` | Process annotation semantics from legacy implementations (optional, options: mate, molecule, kops-dns-controller) |
 | `--connector-source-server="localhost:8080"` | The server to connect for connector source, valid only when using connector source |
 | `--crd-source-apiversion="externaldns.k8s.io/v1alpha1"` | API version of the CRD for crd source, e.g. `externaldns.k8s.io/v1alpha1`, valid only when using crd source |
diff --git a/pkg/apis/externaldns/types.go b/pkg/apis/externaldns/types.go
index b8e8d5c9b..103e54e9c 100644
--- a/pkg/apis/externaldns/types.go
+++ b/pkg/apis/externaldns/types.go
@@ -456,7 +456,7 @@ func App(cfg *Config) *kingpin.Application {
 	// Flags related to processing source
 	app.Flag("always-publish-not-ready-addresses", "Always publish also not ready addresses for headless services (optional)").BoolVar(&cfg.AlwaysPublishNotReadyAddresses)
 	app.Flag("annotation-filter", "Filter resources queried for endpoints by annotation, using label selector semantics").Default(defaultConfig.AnnotationFilter).StringVar(&cfg.AnnotationFilter)
-	app.Flag("combine-fqdn-annotation", "Combine FQDN template and Annotations instead of overwriting").BoolVar(&cfg.CombineFQDNAndAnnotation)
+	app.Flag("combine-fqdn-annotation", "Combine FQDN template and Annotations instead of overwriting (default: false)").BoolVar(&cfg.CombineFQDNAndAnnotation)
 	app.Flag("compatibility", "Process annotation semantics from legacy implementations (optional, options: mate, molecule, kops-dns-controller)").Default(defaultConfig.Compatibility).EnumVar(&cfg.Compatibility, "", "mate", "molecule", "kops-dns-controller")
 	app.Flag("connector-source-server", "The server to connect for connector source, valid only when using connector source").Default(defaultConfig.ConnectorSourceServer).StringVar(&cfg.ConnectorSourceServer)
 	app.Flag("crd-source-apiversion", "API version of the CRD for crd source, e.g. `externaldns.k8s.io/v1alpha1`, valid only when using crd source").Default(defaultConfig.CRDSourceAPIVersion).StringVar(&cfg.CRDSourceAPIVersion)