diff --git a/orbbec_camera/launch/femto.launch.py b/orbbec_camera/launch/femto.launch.py
index 444a4d7b..d2e8b7ea 100644
--- a/orbbec_camera/launch/femto.launch.py
+++ b/orbbec_camera/launch/femto.launch.py
@@ -77,6 +77,7 @@ def generate_launch_description():
         DeclareLaunchArgument("enable_frame_sync", default_value="false"),
         DeclareLaunchArgument("ordered_pc", default_value="false"),
         DeclareLaunchArgument("align_mode", default_value="HW"),
+        DeclareLaunchArgument('align_target_stream', default_value='COLOR'),# COLOR or DEPTH
         DeclareLaunchArgument("laser_energy_level", default_value="-1"),
         DeclareLaunchArgument("enable_heartbeat", default_value="false"),
         DeclareLaunchArgument("time_domain", default_value="device"),