diff --git a/6-asyn-troubleshooting.md b/6-asyn-troubleshooting.md
index 424ca8cc7c7366e3bc8bbe4a5b07f396e224edea..b722e3ae43a4c3b1919c3ccf3e7b7c00ac90b61c 100644
--- a/6-asyn-troubleshooting.md
+++ b/6-asyn-troubleshooting.md
@@ -146,6 +146,8 @@ Type `ctrl+c` in the xterm window or click the `X` in the corner of the window.
 
 #### 6.7.2 Run server-new-fw.py
 
+Reminder: the port argument passed to the `-p` option must match the value of `VMC_PORT` chosen in [step 5.7.2](5-Add-virtual-motors.md#572-modify-iocshvmccmd)
+
 ```
 $ xterm -e "${SUPPORT_DIR}/motorVMC/python/server-new-fw.py -p 33333" &
 ```