diff --git a/iocs/dsmIOC/iocBoot/iocDsm/st.cmd.md90 b/iocs/dsmIOC/iocBoot/iocDsm/st.cmd.md90
index 28be557..3a8a2a4 100644
--- a/iocs/dsmIOC/iocBoot/iocDsm/st.cmd.md90
+++ b/iocs/dsmIOC/iocBoot/iocDsm/st.cmd.md90
@@ -8,7 +8,7 @@ dsm_registerRecordDeviceDriver(pdbbase)
 # Network device
 #!drvAsynIPPortConfigure("serial0", "192.168.1.16:4002",0,0,0)
 # Local serial port
-#!drvAsynSerialPortConfigure("serial0", "/dev/ttyS0", 0, 0, 0)
+#!drvAsynSerialPortConfigure("serial0", "/dev/ttyUSB0", 0, 0, 0)
 drvAsynSerialPortConfigure("serial0", "/tmp/motorport", 0, 0, 0)
 asynSetOption("serial0", 0, "baud", "115200")
 asynSetOption("serial0", 0, "bits", "8")