diff --git a/live-build/lb_binary_layered b/live-build/lb_binary_layered
index 0411f319..e6b762ab 100755
--- a/live-build/lb_binary_layered
+++ b/live-build/lb_binary_layered
@@ -69,7 +69,7 @@ build_layered_squashfs() {
 	create_manifest "chroot" "${squashfs_f_manifest}.full"
 
 	# Delta manifest
-	diff -NU0 ${PWD}/livecd.${PROJECT}.[0-9]{2..2}-${prevpass}.manifest.full ${squashfs_f_manifest}.full|grep -v ^@ > $squashfs_f_manifest
+	diff -NU0 ${PWD}/livecd.${PROJECT}.[0-9][0-9]-${prevpass}.manifest.full ${squashfs_f_manifest}.full|grep -v ^@ > $squashfs_f_manifest
 
 	squashfs_f_size="${base}.size"
 	du -B 1 -s "chroot.${pass}/" | cut -f1 > "${squashfs_f_size}"