diff --git a/fix_junk_in_partition.patch b/fix_junk_in_partition.patch
index 06b6ed9..b526a18 100644
--- a/fix_junk_in_partition.patch
+++ b/fix_junk_in_partition.patch
@@ -1,8 +1,13 @@
-For testing, you can reproduce partition with,
+From: Adam Majer <amajer@suse.com>
+Date: 2020-11-20 17:31+0000
 
-# valgrind --malloc-fill=0xba --track-origins=yes /usr/bin/mkisofs -o test.iso -chrp-boot -part <some_small_directory>
-# fdisk -l test
+There is some uninitialized memory. For testing, you can reproduce
+partition with
 
+	mkdir empty
+	valgrind --malloc-fill=0xba --track-origins=yes \
+		mkisofs -o test.iso -chrp-boot -part empty
+	hexdump -C test.iso
 
 Index: cdrtools-3.02/libhfs_iso/internal.h
 ===================================================================