diff --git a/debian/changelog b/debian/changelog
index 4d5d0b4f..0620e272 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -2,6 +2,9 @@ debian-cd (3.1.5) UNRELEASED; urgency=low
 
   [ Steve McIntyre ]
   * Pass the base mkisofs options into make_disc_trees too.
+  * Switch to --iso-level 4 for powerpc images to make them work better
+    with POWER machines. Thanks to Milan Kupcevic for the patch.
+    Closes: #603536
 
  -- Steve McIntyre <93sam@debian.org>  Sun, 14 Nov 2010 15:37:24 +0000
 
diff --git a/tools/boot/squeeze/boot-powerpc b/tools/boot/squeeze/boot-powerpc
index 80946e8f..c4223c4f 100755
--- a/tools/boot/squeeze/boot-powerpc
+++ b/tools/boot/squeeze/boot-powerpc
@@ -29,7 +29,7 @@ cd $CDDIR/..
 
 install_languages $CDDIR
 
-add_mkisofs_opt $CDDIR/../$N.mkisofs_opts "--iso-level 2"
+add_mkisofs_opt $CDDIR/../$N.mkisofs_opts "--iso-level 4"
 add_mkisofs_opt $CDDIR/../$N.mkisofs_opts "--netatalk"
 add_mkisofs_opt $CDDIR/../$N.mkisofs_opts "-hfs"
 add_mkisofs_opt $CDDIR/../$N.mkisofs_opts "-probe"