diff --git a/sh/runscript.sh.in b/sh/runscript.sh.in
index fe30a039..58532125 100644
--- a/sh/runscript.sh.in
+++ b/sh/runscript.sh.in
@@ -49,8 +49,7 @@ sourcex "@SYSCONFDIR@/init.d/functions.sh"
 sourcex "@LIBEXECDIR@/sh/rc-functions.sh"
 
 # Support LiveCD foo
-if [ -r /sbin/livecd-functions.sh ]; then
-	sourcex "/sbin/livecd-functions.sh"
+if sourcex -e "/sbin/livecd-functions.sh"; then
 	livecd_read_commandline
 fi