diff --git a/lib/util-iso.sh b/lib/util-iso.sh
index ee49288..d87e69a 100644
--- a/lib/util-iso.sh
+++ b/lib/util-iso.sh
@@ -364,7 +364,7 @@ make_image_desktop() {
         seed_snaps ${path}
         
         echo "Enable os-prober"
-        sed -i -e 's,.*GRUB_DISABLE_OS_PROBER=.*,GRUB_DISABLE_OS_PROBER=false",' "${path}/etc/default/grub"
+        sed -i -e 's,.*GRUB_DISABLE_OS_PROBER=.*,GRUB_DISABLE_OS_PROBER=false,' "${path}/etc/default/grub"
 
         umount_fs
         clean_up_image "${path}"