diff --git a/staging/src/k8s.io/apiserver/pkg/server/options/etcd.go b/staging/src/k8s.io/apiserver/pkg/server/options/etcd.go
index 358776a790b..5ac56109a32 100644
--- a/staging/src/k8s.io/apiserver/pkg/server/options/etcd.go
+++ b/staging/src/k8s.io/apiserver/pkg/server/options/etcd.go
@@ -116,7 +116,8 @@ func (s *EtcdOptions) AddFlags(fs *pflag.FlagSet) {
 
 	fs.StringSliceVar(&s.EtcdServersOverrides, "etcd-servers-overrides", s.EtcdServersOverrides, ""+
 		"Per-resource etcd servers overrides, comma separated. The individual override "+
-		"format: group/resource#servers, where servers are URLs, semicolon separated.")
+		"format: group/resource#servers, where servers are URLs, semicolon separated. "+
+		"Note that etcd servers overrides currently do not support CRDs.")
 
 	fs.StringVar(&s.DefaultStorageMediaType, "storage-media-type", s.DefaultStorageMediaType, ""+
 		"The media type to use to store objects in storage. "+