diff --git a/cmd/nfd-master/main.go b/cmd/nfd-master/main.go
index 58d0ca432..340ffcf09 100644
--- a/cmd/nfd-master/main.go
+++ b/cmd/nfd-master/main.go
@@ -61,6 +61,7 @@ func main() {
 		case "label-whitelist":
 			args.Overrides.LabelWhiteList = overrides.LabelWhiteList
 		case "resource-labels":
+			klog.Warningf("-resource-labels is deprecated, extended resources should be managed with NodeFeatureRule objects")
 			args.Overrides.ResourceLabels = overrides.ResourceLabels
 		case "enable-taints":
 			args.Overrides.EnableTaints = overrides.EnableTaints
@@ -143,7 +144,7 @@ func initFlags(flagset *flag.FlagSet) (*master.Args, *master.ConfigOverrideArgs)
 	flagset.Var(overrides.DenyLabelNs, "deny-label-ns",
 		"Comma separated list of denied label namespaces")
 	flagset.Var(overrides.ResourceLabels, "resource-labels",
-		"Comma separated list of labels to be exposed as extended resources.")
+		"Comma separated list of labels to be exposed as extended resources. DEPRECATED: use NodeFeatureRule objects instead")
 
 	return args, overrides
 }
diff --git a/docs/reference/master-commandline-reference.md b/docs/reference/master-commandline-reference.md
index bf8cc7787..c1260e989 100644
--- a/docs/reference/master-commandline-reference.md
+++ b/docs/reference/master-commandline-reference.md
@@ -256,6 +256,9 @@ nfd-master -deny-label-ns=*.vendor.com,vendor-2.io
 
 ### -resource-labels
 
+**DEPRECATED**: [NodeFeatureRule](../usage/custom-resources.md#nodefeaturerule)
+should be used for managing extended resources in NFD.
+
 The `-resource-labels` flag specifies a comma-separated list of features to be
 advertised as extended resources instead of labels. Features that have integer
 values can be published as Extended Resources by listing them in this flag.
diff --git a/docs/reference/master-configuration-reference.md b/docs/reference/master-configuration-reference.md
index 7957d4ab5..b11bb4cb8 100644
--- a/docs/reference/master-configuration-reference.md
+++ b/docs/reference/master-configuration-reference.md
@@ -71,6 +71,10 @@ denyLabelNs: ["denied.ns.io","denied.kubernetes.io"]
 ```
 
 ## resourceLabels
+
+**DEPRECATED**: [NodeFeatureRule](../usage/custom-resources.md#nodefeaturerule)
+should be used for managing extended resources in NFD.
+
 The `resourceLabels` option specifies a list of features to be
 advertised as extended resources instead of labels. Features that have integer
 values can be published as Extended Resources by listing them in this option.