diff --git a/rc/bin/cpurc b/rc/bin/cpurc
index e1f8b74ce..482b13259 100755
--- a/rc/bin/cpurc
+++ b/rc/bin/cpurc
@@ -69,6 +69,9 @@ case *
 if(test -f /dev/apm)
 	aux/apm
 
+if(test -e /cfg/$sysname/cpustart)
+	. /cfg/$sysname/cpustart
+
 # mode of /proc/*/ctl is inherited across rfork, and sets modes on
 # other /proc files, such as note, so let listen be killed.
 dontkill '^(ipconfig|factotum|mntgen|venti|kfs|cwfs.*|cs|dns|reboot)$'