diff --git a/plugins/hosts/windows/plugin.rb b/plugins/hosts/windows/plugin.rb
index f76d5c27d..640951047 100644
--- a/plugins/hosts/windows/plugin.rb
+++ b/plugins/hosts/windows/plugin.rb
@@ -70,6 +70,11 @@ module VagrantPlugins
         require_relative "cap/ssh"
         Cap::SSH
       end
+
+      host_capability("windows", "smb_validate_password") do
+        require_relative "cap/smb"
+        Cap::SMB
+      end
     end
   end
 end
diff --git a/plugins/synced_folders/smb/synced_folder.rb b/plugins/synced_folders/smb/synced_folder.rb
index 5e99a4ef7..b6520cd52 100644
--- a/plugins/synced_folders/smb/synced_folder.rb
+++ b/plugins/synced_folders/smb/synced_folder.rb
@@ -66,7 +66,7 @@ module VagrantPlugins
             if machine.env.host.capability?(:smb_validate_password)
               Vagrant::Util::CredentialScrubber.sensitive(smb_password)
               auth_success = machine.env.host.capability(:smb_validate_password,
-                smb_username, smb_password)
+                machine, smb_username, smb_password)
             end
 
             break if auth_success