diff --git a/db/migrate/20181025230931_add_comments_to_vms_table.rb b/db/migrate/20181025230931_add_comments_to_vms_table.rb
index e34163748..52e111d21 100644
--- a/db/migrate/20181025230931_add_comments_to_vms_table.rb
+++ b/db/migrate/20181025230931_add_comments_to_vms_table.rb
@@ -42,7 +42,7 @@ def change
                                                   "crashes it will immediately pick up on another host in the cluster."
 
     change_column_comment :vms, :flavor_id, "ID of associated flavor."
-    change_column_comment :vms, :format, "The format of the VM's disk, such as VMDK."
+    change_column_comment :vms, :format, "The format of the VM's disk, such as VMDK. Deprecated."
     change_column_comment :vms, :guid, "A value used to uniquely identify the VM internally."
     change_column_comment :vms, :id, "The internal database ID."
     change_column_comment :vms, :host_id, "ID of the host that the VM/Template resides on."