diff --git a/ChangeLog b/ChangeLog
index 18eb66b51..1977f24ad 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2010-03-14  Thorsten Glaser <tg@mirbsd.org>
+
+	* util/grub-mkrescue.in: Base ISO UUID on UTC.
+
 2010-03-08  Matt Kraai  <kraai@ftbfs.org>
 
 	* util/i386/pc/grub-setup.c (setup): Fix a grammatical error (Debian
diff --git a/util/grub-mkrescue.in b/util/grub-mkrescue.in
index 592cf2df6..db29b0899 100644
--- a/util/grub-mkrescue.in
+++ b/util/grub-mkrescue.in
@@ -145,7 +145,7 @@ if test -e "${coreboot_dir}" ; then
     memdisk_dir=`mktemp -d "$MKTEMP_TEMPLATE"`
     mkdir -p ${memdisk_dir}/boot/grub
     # obtain date-based UUID
-    iso_uuid=$(date +%Y-%m-%d-%H-%M-%S-00)
+    iso_uuid=$(date -u +%Y-%m-%d-%H-%M-%S-00)
 
     modules="$(cat ${coreboot_dir}/partmap.lst) ${modules}"
     cat << EOF > ${memdisk_dir}/boot/grub/grub.cfg