diff --git a/staging/src/k8s.io/cli-runtime/pkg/genericclioptions/builder_flags.go b/staging/src/k8s.io/cli-runtime/pkg/genericclioptions/builder_flags.go
index 8db95f927c9..f695fb5f9bd 100644
--- a/staging/src/k8s.io/cli-runtime/pkg/genericclioptions/builder_flags.go
+++ b/staging/src/k8s.io/cli-runtime/pkg/genericclioptions/builder_flags.go
@@ -130,6 +130,10 @@ func (o *ResourceBuilderFlags) ToBuilder(restClientGetter RESTClientGetter, reso
 	builder := resource.NewBuilder(restClientGetter).
 		NamespaceParam(namespace).DefaultNamespace()
 
+	if o.AllNamespaces != nil {
+		builder.AllNamespaces(*o.AllNamespaces)
+	}
+
 	if o.Scheme != nil {
 		builder.WithScheme(o.Scheme, o.Scheme.PrioritizedVersionsAllGroups()...)
 	} else {