diff --git a/google/oauth2/_reauth_async.py b/google/oauth2/_reauth_async.py
index 0276ddd0b..30b0b0b1e 100644
--- a/google/oauth2/_reauth_async.py
+++ b/google/oauth2/_reauth_async.py
@@ -307,7 +307,7 @@ async def refresh_grant(
     ):
         if not enable_reauth_refresh:
             raise exceptions.RefreshError(
-                "Reauthentication is needed. Please run `gcloud auth login --update-adc` to reauthenticate."
+                "Reauthentication is needed. Please run `gcloud auth application-default login` to reauthenticate."
             )
 
         rapt_token = await get_rapt_token(
diff --git a/google/oauth2/reauth.py b/google/oauth2/reauth.py
index cbf1d7f09..2c32bda2a 100644
--- a/google/oauth2/reauth.py
+++ b/google/oauth2/reauth.py
@@ -332,7 +332,7 @@ def refresh_grant(
     ):
         if not enable_reauth_refresh:
             raise exceptions.RefreshError(
-                "Reauthentication is needed. Please run `gcloud auth login --update-adc` to reauthenticate."
+                "Reauthentication is needed. Please run `gcloud auth application-default login` to reauthenticate."
             )
 
         rapt_token = get_rapt_token(