diff --git a/usr/share/archboot/installer/setup b/usr/share/archboot/installer/setup
index 116c96588..606f9e79c 100755
--- a/usr/share/archboot/installer/setup
+++ b/usr/share/archboot/installer/setup
@@ -1953,8 +1953,8 @@ auto_network()
 # change mkinitcpio.conf to use lzma compression by default!
 auto_lzma()
 {
-  sed -i -e 's:^#COMPRESSION=\"lzma\":COMPRESSION=\"lzma\"#g' $DESTDIR/etc/mkinitcpio.conf
-  sed -i -e 's#^COMPRESSION=.*#COMPRESSION=\"lzma\"#g' $DESTDIR/etc/mkinitcpio.conf
+  sed -i -e 's:^#COMPRESSION=\"lzma\":COMPRESSION=\"lzma\":g' $DESTDIR/etc/mkinitcpio.conf
+  sed -i -e 's:^COMPRESSION=.*:COMPRESSION=\"lzma\":g' $DESTDIR/etc/mkinitcpio.conf
 }
 
 # donetwork()