diff --git a/once/update.sh b/once/update.sh
index 6385e2e..e09572e 100755
--- a/once/update.sh
+++ b/once/update.sh
@@ -10,6 +10,10 @@ else
 	mkdir -p "$SYSROOT" || exit 2
 fi
 
+if [ -f "$SYSROOT/etc/localtime" ]; then
+	cp -p "$SYSROOT/etc/localtime" "$SYSROOT/etc/localtime.site"
+fi
+
 tarballs=$(ls /updates/*.tar.gz 2>/dev/null)
 
 if [ "$tarballs" = '/updates/*.tar.gz' ]; then
@@ -44,6 +48,10 @@ for tarball in $tarballs; do
 	echo
 done
 
+if [ -f "$SYSROOT/etc/localtime.site" ]; then
+	mv "$SYSROOT/etc/localtime.site" "$SYSROOT/etc/localtime"
+fi
+
 rm -f /updates/update.pending
 
 echo