diff --git a/custom-coreos-disk-images.sh b/custom-coreos-disk-images.sh
index e7ac79b..05dc367 100755
--- a/custom-coreos-disk-images.sh
+++ b/custom-coreos-disk-images.sh
@@ -133,12 +133,18 @@ main() {
 
         suffix=
         case $platform in 
-            metal)
+            applehv)
                 suffix=raw
                 ;;
             gcp)
                 suffix=tar.gz
                 ;;
+            hyperv)
+                suffix=vhdx
+                ;;
+            metal)
+                suffix=raw
+                ;;
             qemu)
                 suffix=qcow2
                 ;;