diff --git a/plugins/provisioners/salt/config.rb b/plugins/provisioners/salt/config.rb
index 638a07bfb..253e7e8bf 100644
--- a/plugins/provisioners/salt/config.rb
+++ b/plugins/provisioners/salt/config.rb
@@ -33,6 +33,7 @@ module VagrantPlugins
       attr_accessor :install_args
       attr_accessor :install_master
       attr_accessor :install_syndic
+      attr_accessor :install_command
       attr_accessor :no_minion
       attr_accessor :bootstrap_options
       attr_accessor :version
@@ -59,6 +60,7 @@ module VagrantPlugins
         @install_args = UNSET_VALUE
         @install_master = UNSET_VALUE
         @install_syndic = UNSET_VALUE
+        @install_command = UNSET_VALUE
         @no_minion = UNSET_VALUE
         @bootstrap_options = UNSET_VALUE
         @config_dir = UNSET_VALUE
@@ -89,6 +91,7 @@ module VagrantPlugins
         @install_args       = nil if @install_args == UNSET_VALUE
         @install_master     = nil if @install_master == UNSET_VALUE
         @install_syndic     = nil if @install_syndic == UNSET_VALUE
+        @install_command     = nil if @install_command == UNSET_VALUE
         @no_minion          = nil if @no_minion == UNSET_VALUE
         @bootstrap_options  = nil if @bootstrap_options == UNSET_VALUE
         @config_dir         = nil if @config_dir == UNSET_VALUE