diff --git a/vagrant/ansible/roles/vm/files/templates/windows.json b/vagrant/ansible/roles/vm/files/templates/windows.json
index ca552231..cac7784d 100644
--- a/vagrant/ansible/roles/vm/files/templates/windows.json
+++ b/vagrant/ansible/roles/vm/files/templates/windows.json
@@ -7,8 +7,7 @@
             "cpus": "{{ user `cpus` }}",
             "memory": "{{ user `memory` }}",
             "iso_url": "{{user `iso_url`}}",
-            "iso_checksum_type": "{{user `iso_checksum_type`}}",
-            "iso_checksum": "{{user `iso_checksum`}}",
+            "iso_checksum": "{{user `iso_checksum_type`}}:{{user `iso_checksum`}}",
             "headless": true,
             "disk_compression": "true",
             "skip_compaction": "false",
@@ -47,4 +46,4 @@
         "winrm_username": "vagrant",
         "winrm_password": "vagrant"
     }
-}
+}
\ No newline at end of file