diff --git a/plugins/provisioners/salt/config.rb b/plugins/provisioners/salt/config.rb
index b42cfb00d..225888def 100644
--- a/plugins/provisioners/salt/config.rb
+++ b/plugins/provisioners/salt/config.rb
@@ -24,6 +24,7 @@ module VagrantPlugins
       attr_accessor :log_level
       attr_accessor :masterless
       attr_accessor :minion_id
+      attr_accessor :salt_call_args
 
       ## bootstrap options
       attr_accessor :temp_config_dir
@@ -66,6 +67,7 @@ module VagrantPlugins
         @version = UNSET_VALUE
         @run_service = UNSET_VALUE
         @master_id = UNSET_VALUE
+        @salt_call_args = UNSET_VALUE
       end
 
       def finalize!
@@ -91,6 +93,7 @@ module VagrantPlugins
         @version            = nil if @version == UNSET_VALUE
         @run_service        = nil if @run_service == UNSET_VALUE
         @master_id          = nil if @master_id == UNSET_VALUE
+        @salt_call_args     = nil if @salt_call_args == UNSET_VALUE
 
         # NOTE: Optimistic defaults are set in the provisioner. UNSET_VALUEs
         # are converted there to allow proper detection of unset values.
diff --git a/plugins/provisioners/salt/provisioner.rb b/plugins/provisioners/salt/provisioner.rb
index deefa1428..b00cbb059 100644
--- a/plugins/provisioners/salt/provisioner.rb
+++ b/plugins/provisioners/salt/provisioner.rb
@@ -198,6 +198,18 @@ module VagrantPlugins
         return options
       end
 
+      # Append additional arguments to the salt-call command
+      def get_call_args
+        options = ""
+        if @config.salt_call_args
+          @config.salt_call_args.each do |opt|
+            options += " #{opt}"
+          end
+        end
+
+        return options
+      end
+
       # Copy master and minion configs to VM
       def upload_configs
         if @config.minion_config
@@ -377,7 +389,7 @@ module VagrantPlugins
                 @machine.communicate.execute("C:\\salt\\salt-call.bat saltutil.sync_all", opts)
               end
               # TODO: something equivalent to { error_key: :ssh_bad_exit_status_muted }?
-              @machine.communicate.execute("C:\\salt\\salt-call.bat state.highstate --retcode-passthrough#{get_masterless}#{get_loglevel}#{get_colorize}#{get_pillar}", opts) do |type, data|
+              @machine.communicate.execute("C:\\salt\\salt-call.bat state.highstate --retcode-passthrough#{get_masterless}#{get_loglevel}#{get_colorize}#{get_pillar}#{get_call_args}", opts) do |type, data|
                 if @config.verbose
                   @machine.env.ui.info(data.rstrip)
                 end
@@ -386,7 +398,7 @@ module VagrantPlugins
               unless @config.masterless?
                 @machine.communicate.sudo("salt-call saltutil.sync_all")
               end
-              @machine.communicate.sudo("salt-call state.highstate --retcode-passthrough#{get_masterless}#{get_loglevel}#{get_colorize}#{get_pillar}", ssh_opts) do |type, data|
+              @machine.communicate.sudo("salt-call state.highstate --retcode-passthrough#{get_masterless}#{get_loglevel}#{get_colorize}#{get_pillar}#{get_call_args}", ssh_opts) do |type, data|
                 if @config.verbose
                   @machine.env.ui.info(data.rstrip)
                 end
diff --git a/test/unit/plugins/provisioners/salt/provisioner_test.rb b/test/unit/plugins/provisioners/salt/provisioner_test.rb
index b203ea332..5920478ff 100644
--- a/test/unit/plugins/provisioners/salt/provisioner_test.rb
+++ b/test/unit/plugins/provisioners/salt/provisioner_test.rb
@@ -32,4 +32,47 @@ describe VagrantPlugins::Salt::Provisioner do
   describe "#provision" do
 
   end
+
+  describe "#call_highstate" do
+    context "with masterless" do
+      it "passes along extra cli flags" do
+        allow(config).to receive(:run_highstate).and_return(true)
+        allow(config).to receive(:verbose).and_return(true)
+        allow(config).to receive(:masterless?).and_return(true)
+        allow(config).to receive(:masterless).and_return(true)
+        allow(config).to receive(:minion_id).and_return(nil)
+        allow(config).to receive(:log_level).and_return(nil)
+        allow(config).to receive(:colorize).and_return(false)
+        allow(config).to receive(:pillar_data).and_return([])
+
+        allow(config).to receive(:salt_call_args).and_return(["--output-dif"])
+        allow(machine.communicate).to receive(:sudo)
+        allow(machine.config.vm).to receive(:communicator).and_return(:notwinrm)
+        allow(config).to receive(:install_master).and_return(false)
+
+        expect(machine.communicate).to receive(:sudo).with("salt-call state.highstate --retcode-passthrough --local --log-level=debug --no-color --output-dif", {:error_key=>:ssh_bad_exit_status_muted})
+        subject.call_highstate()
+      end
+
+      it "has no additional cli flags if not included" do
+        allow(config).to receive(:run_highstate).and_return(true)
+        allow(config).to receive(:verbose).and_return(true)
+        allow(config).to receive(:masterless?).and_return(true)
+        allow(config).to receive(:masterless).and_return(true)
+        allow(config).to receive(:minion_id).and_return(nil)
+        allow(config).to receive(:log_level).and_return(nil)
+        allow(config).to receive(:colorize).and_return(false)
+        allow(config).to receive(:pillar_data).and_return([])
+
+        allow(config).to receive(:salt_call_args).and_return(nil)
+        allow(machine.communicate).to receive(:sudo)
+        allow(machine.config.vm).to receive(:communicator).and_return(:notwinrm)
+        allow(config).to receive(:install_master).and_return(false)
+
+        expect(machine.communicate).to receive(:sudo).with("salt-call state.highstate --retcode-passthrough --local --log-level=debug --no-color", {:error_key=>:ssh_bad_exit_status_muted})
+        subject.call_highstate()
+      end
+    end
+  end
+
 end
diff --git a/website/source/docs/provisioning/salt.html.md b/website/source/docs/provisioning/salt.html.md
index 1f3ea1e4e..0bf1fe1f8 100644
--- a/website/source/docs/provisioning/salt.html.md
+++ b/website/source/docs/provisioning/salt.html.md
@@ -94,6 +94,8 @@ public key
 
 * `masterless`  (boolean) - Calls state.highstate in local mode. Uses `minion_id` and `pillar_data` when provided.
 
+* `salt_call_args` (array) - An array of additional command line flag arguments to be passed to the `salt-call` command when provisioning with masterless.
+
 ## Master Options
 These only make sense when `install_master` is `true`. Not supported on Windows guest machines.