diff --git a/debian/changelog b/debian/changelog
index 63703e56..09a3dd24 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,6 +1,7 @@
 debian-cd (3.1.1) UNRELEASED; urgency=low
 
   * sparc: remove bogus default "append=cdrom" line from silo.conf template.
+  * sparc: ensure the default 'install' option also gets KERNEL_PARAMS set.
 
  -- Frans Pop <fjp@debian.org>  Tue, 20 Jan 2009 01:30:11 +0100
 
diff --git a/tools/boot/lenny/boot-sparc b/tools/boot/lenny/boot-sparc
index 095c7380..00c06f0f 100755
--- a/tools/boot/lenny/boot-sparc
+++ b/tools/boot/lenny/boot-sparc
@@ -49,7 +49,14 @@ $BASEDIR/tools/which_deb $MIRROR $DI_CODENAME silo source >> $CDDIR/../$N.pkgs_e
 # Some custom etc files
 cp -f -p $BASEDIR/data/lenny/sparc/silo.conf $inst/boot/
 if [ -n "$KERNEL_PARAMS" ]; then
-    sed -i "/^[[:space:]]\+append=\"/ s|append=\"|append=\"$KERNEL_PARAMS |" $inst/boot/silo.conf
+	# Add KERNEL_PARAMS to any existing append line
+	sed -i "/^[[:space:]]*append=\"/ s|append=\"|append=\"$KERNEL_PARAMS |" \
+		$inst/boot/silo.conf
+	# If there is no default append= line, add it
+	if ! grep -q "^append=" $inst/boot/silo.conf; then
+		sed -i "/^default=/ a\append=\"$KERNEL_PARAMS\"" \
+			$inst/boot/silo.conf
+	fi
 fi
 cat $BASEDIR/data/lenny/sparc/debian.txt \
  | sed "s/\${MEDIA_TYPE}/CDROM/" \