diff --git a/etc/devd.conf b/etc/devd.conf
index bb41b5bf3373..32466596f020 100644
--- a/etc/devd.conf
+++ b/etc/devd.conf
@@ -115,6 +115,11 @@ attach 100 {
 	action "/etc/rc.d/moused quietstart $device-name";
 };
 
+detach 100 { 
+        device-name "ums[0-9]+"; 
+        action "/etc/rc.d/moused stop $device-name"; 
+}; 
+
 # Firmware download into the ActiveWire board. After the firmware download is
 # done the device detaches and reappears as something new and shiny
 # automatically.