diff --git a/libexec/rc/rc.d/kdc b/libexec/rc/rc.d/kdc
--- a/libexec/rc/rc.d/kdc
+++ b/libexec/rc/rc.d/kdc
@@ -21,7 +21,10 @@
 kdc_start_precmd()
 {
 
-	command_args="$command_args --detach"
+	if [ "${kdc_program}" = /usr/libexec/kdc -o \
+	     "${kdc_program}" = /usr/local/libexec/kdc ]; then
+		command_args="$command_args --detach"
+	fi
 }
 
 load_rc_config $name