diff --git a/poky/scripts/lib/wic/canned-wks/mkhybridiso.wks b/poky/scripts/lib/wic/canned-wks/mkhybridiso.wks
index 9d34e9b..48c5ac4 100644
--- a/poky/scripts/lib/wic/canned-wks/mkhybridiso.wks
+++ b/poky/scripts/lib/wic/canned-wks/mkhybridiso.wks
@@ -2,6 +2,6 @@
 # long-description: Creates an EFI and legacy bootable hybrid ISO image
 # which can be used on optical media as well as USB media.
 
-part /boot --source isoimage-isohybrid --sourceparams="loader=grub-efi,image_name=HYBRID_ISO_IMG" --ondisk cd --label HYBRIDISO --fstype=ext4
+part /boot --source isoimage-isohybrid --sourceparams="loader=grub-efi,image_name=HYBRID_ISO_IMG" --ondisk cd --label HYBRIDISO
 
 bootloader  --timeout=15  --append=""