diff --git a/doc/usage.md b/doc/usage.md
index ce3668b..a9f6cf0 100644
--- a/doc/usage.md
+++ b/doc/usage.md
@@ -5,7 +5,7 @@
 ### Real Robot Arm
 
 ```bash
-roslaunch z1_bingup real_arm.launch rivz:=true
+roslaunch z1_bringup real_arm.launch rivz:=true
 ```
 
 ### Simulated Robot Arm
@@ -78,4 +78,4 @@ The user can also easily control the motors directly.
 ```bash
 rosrun z1_sdk example_lowcmd
 rosrun z1_sdk example_lowcmd.py
-```
\ No newline at end of file
+```