diff --git a/libisoburn/trunk/doc/partition_offset.wiki b/libisoburn/trunk/doc/partition_offset.wiki
index 61f7a4db..c370c071 100644
--- a/libisoburn/trunk/doc/partition_offset.wiki
+++ b/libisoburn/trunk/doc/partition_offset.wiki
@@ -140,7 +140,8 @@ as above RIPLinux example. It boots to a GRUB prompt.
 
 Due to options -no-pad --no-emul-toc the image is about 300 kB smaller than
 the image produced by original grub-mkrescue. Else it would have grown by
-about 130 kB.
+about 130 kB. The mkisofs emulation of newer versions of xorriso has
+--no-emul-toc as default. Thus the overhead would only be about 50 kB.
 
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