diff --git a/scripts/install_software.sh b/scripts/install_software.sh
index 97c5ef7..9565b66 100644
--- a/scripts/install_software.sh
+++ b/scripts/install_software.sh
@@ -87,7 +87,7 @@ make px4_sitl
 
 echo "--- Build mavlink"
 cd ~/catkin_ws
-catkin_make mavlink_c_generate -DCATKIN_WHITELIST_PACKAGES="px4"  # Prebuilt px4's mavlink to force mavlink_sitl_gazebo use it
+catkin_make mavlink_c_generate -DCATKIN_WHITELIST_PACKAGES="px4"  # at first build px4's mavlink to force mavlink_sitl_gazebo to use it
 ln -s "." build/mavlink/mavlink  # fix https://github.com/PX4/PX4-Autopilot/pull/19964
 
 echo "--- Building the workspace"