diff --git a/plugins/providers/virtualbox/synced_folder.rb b/plugins/providers/virtualbox/synced_folder.rb
index b40e9277b..89b006cf2 100644
--- a/plugins/providers/virtualbox/synced_folder.rb
+++ b/plugins/providers/virtualbox/synced_folder.rb
@@ -125,9 +125,8 @@ module VagrantPlugins
               hostpath: hostpath.to_s,
               transient: transient,
               SharedFoldersEnableSymlinksCreate: enable_symlink_create,
-              automount: data[:automount]
-            }.delete_if { |_,v| v.nil?}
-
+              automount: !!data[:automount]
+            }
           end
         end
 
diff --git a/test/unit/plugins/providers/virtualbox/synced_folder_test.rb b/test/unit/plugins/providers/virtualbox/synced_folder_test.rb
index 2aaba1ac2..a5b121581 100644
--- a/test/unit/plugins/providers/virtualbox/synced_folder_test.rb
+++ b/test/unit/plugins/providers/virtualbox/synced_folder_test.rb
@@ -43,6 +43,7 @@ describe VagrantPlugins::ProviderVirtualBox::SyncedFolder do
                       {:SharedFoldersEnableSymlinksCreate=>true,
                        :guestpath=>"/folder",
                        :hostpath=>"/Users/brian/vagrant-folder",
+                       :automount=>false,
                        :disabled=>false,
                        :__vagrantfile=>true}} }
 
@@ -50,6 +51,7 @@ describe VagrantPlugins::ProviderVirtualBox::SyncedFolder do
                                 {:SharedFoldersEnableSymlinksCreate=>false,
                                  :guestpath=>"/folder",
                                  :hostpath=>"/Users/brian/vagrant-folder",
+                                 :automount=>false,
                                  :disabled=>false,
                                  :__vagrantfile=>true}} }
 
@@ -65,6 +67,7 @@ describe VagrantPlugins::ProviderVirtualBox::SyncedFolder do
     let(:folders_nosymvar) { {"/folder"=>
                                 {:guestpath=>"/folder",
                                  :hostpath=>"/Users/brian/vagrant-folder",
+                                 :automount=>false,
                                  :disabled=>false,
                                  :__vagrantfile=>true}} }
 
@@ -75,26 +78,26 @@ describe VagrantPlugins::ProviderVirtualBox::SyncedFolder do
     end
 
     it "should prepare and share the folders" do
-      expect(driver).to receive(:share_folders).with([{:name=>"folder", :hostpath=>"/Users/brian/vagrant-folder", :transient=>false, :SharedFoldersEnableSymlinksCreate=>true}])
+      expect(driver).to receive(:share_folders).with([{:name=>"folder", :hostpath=>"/Users/brian/vagrant-folder", :transient=>false, :automount=>false, :SharedFoldersEnableSymlinksCreate=>true}])
       subject.prepare(machine, folders, nil)
     end
 
     it "should prepare and share the folders without symlinks enabled" do
-      expect(driver).to receive(:share_folders).with([{:name=>"folder", :hostpath=>"/Users/brian/vagrant-folder", :transient=>false, :SharedFoldersEnableSymlinksCreate=>false}])
+      expect(driver).to receive(:share_folders).with([{:name=>"folder", :hostpath=>"/Users/brian/vagrant-folder", :transient=>false, :automount=>false, :SharedFoldersEnableSymlinksCreate=>false}])
       subject.prepare(machine, folders_disabled, nil)
     end
 
     it "should prepare and share the folders without symlinks enabled with env var set" do
       stub_env('VAGRANT_DISABLE_VBOXSYMLINKCREATE'=>'1')
 
-      expect(driver).to receive(:share_folders).with([{:name=>"folder", :hostpath=>"/Users/brian/vagrant-folder", :transient=>false, :SharedFoldersEnableSymlinksCreate=>false}])
+      expect(driver).to receive(:share_folders).with([{:name=>"folder", :hostpath=>"/Users/brian/vagrant-folder", :transient=>false, :automount=>false, :SharedFoldersEnableSymlinksCreate=>false}])
       subject.prepare(machine, folders_nosymvar, nil)
     end
 
     it "should prepare and share the folders and override symlink setting" do
       stub_env('VAGRANT_DISABLE_VBOXSYMLINKCREATE'=>'1')
 
-      expect(driver).to receive(:share_folders).with([{:name=>"folder", :hostpath=>"/Users/brian/vagrant-folder", :transient=>false, :SharedFoldersEnableSymlinksCreate=>true}])
+      expect(driver).to receive(:share_folders).with([{:name=>"folder", :hostpath=>"/Users/brian/vagrant-folder", :transient=>false, :automount=>false, :SharedFoldersEnableSymlinksCreate=>true}])
       subject.prepare(machine, folders, nil)
     end