diff --git a/README.md b/README.md
index 1c36959..748a331 100644
--- a/README.md
+++ b/README.md
@@ -108,6 +108,10 @@ In catkin_ws (or any working directory) add to devel/setup.bash:
 
 	cd $CURRENT_DIR
 
+Finally, source your setup.bash file
+	cd ~/catkin_ws
+	source devel/setup.bash
+
 ## JINJA TETHER FILE
 - _spiri_with_tether.sdf.jinja_ can be altered to create desired tether model
 - changes need to be made in px4 directory and will only take effect after running: "make px4_sitl gazebo"