diff --git a/plugins/kernel_v2/config/vm.rb b/plugins/kernel_v2/config/vm.rb
index 879a4f466..7ec7942aa 100644
--- a/plugins/kernel_v2/config/vm.rb
+++ b/plugins/kernel_v2/config/vm.rb
@@ -400,7 +400,7 @@ module VagrantPlugins
           block.call(disk, VagrantConfigDisk)
         end
 
-        disk.add_config(options, block)
+        disk.add_config(options, &block)
 
         @__drives << disk