diff --git a/src/google/adk/cli/cli_deploy.py b/src/google/adk/cli/cli_deploy.py
index 8da65d0e..45dce7fd 100644
--- a/src/google/adk/cli/cli_deploy.py
+++ b/src/google/adk/cli/cli_deploy.py
@@ -915,7 +915,7 @@ def to_agent_engine(
       )
     else:
       if project and region and not agent_engine_id.startswith('projects/'):
-        agent_engine_id = f'projects/{project}/locations/{region}/agentEngines/{agent_engine_id}'
+        agent_engine_id = f'projects/{project}/locations/{region}/reasoningEngines/{agent_engine_id}'
       client.agent_engines.update(name=agent_engine_id, config=agent_config)
       click.secho(f'✅ Updated agent engine: {agent_engine_id}', fg='green')
   finally: