diff --git a/google-api-client/src/main/java/com/google/api/client/googleapis/auth/oauth2/OAuth2Utils.java b/google-api-client/src/main/java/com/google/api/client/googleapis/auth/oauth2/OAuth2Utils.java
index <HASH>..<HASH> 100644
--- a/google-api-client/src/main/java/com/google/api/client/googleapis/auth/oauth2/OAuth2Utils.java
+++ b/google-api-client/src/main/java/com/google/api/client/googleapis/auth/oauth2/OAuth2Utils.java
@@ -19,6 +19,7 @@ import com.google.api.client.http.HttpHeaders;
 import com.google.api.client.http.HttpRequest;
 import com.google.api.client.http.HttpResponse;
 import com.google.api.client.http.HttpTransport;
+import com.google.api.client.util.Beta;
 
 import java.io.IOException;
 import java.net.SocketTimeoutException;
@@ -30,6 +31,7 @@ import java.util.logging.Logger;
 /**
  * Utilities used by the com.google.api.client.googleapis.auth.oauth2 namespace.
  */
+@Beta
 public class OAuth2Utils {
 
   static final Charset UTF_8 = Charset.forName("UTF-8");
Mark OAuth2Utils as Beta

It isn't really meant to be used generally, but needs to be exposed for
the different components to reuse code.