diff --git a/plugins/provisioners/shell/config.rb b/plugins/provisioners/shell/config.rb
index 931fadd14..c0b0b7cf2 100644
--- a/plugins/provisioners/shell/config.rb
+++ b/plugins/provisioners/shell/config.rb
@@ -66,7 +66,13 @@ module VagrantPlugins
       # string or as an array.
       def args_valid?
         return true if !args
-        args.is_a?(String) || args.is_a?(Array)
+        return true if args.is_a?(String) or args.is_a?(Fixnum)
+        if args.is_a?(Array)
+          args.each do |a|
+            return false if not a.kind_of?(String) and not a.kind_of?(Fixnum)
+          end
+          return true
+        end
       end
 
       def remote?
diff --git a/plugins/provisioners/shell/provisioner.rb b/plugins/provisioners/shell/provisioner.rb
index e258286bf..04ee3c8ef 100644
--- a/plugins/provisioners/shell/provisioner.rb
+++ b/plugins/provisioners/shell/provisioner.rb
@@ -8,10 +8,10 @@ module VagrantPlugins
     class Provisioner < Vagrant.plugin("2", :provisioner)
       def provision
         args = ""
-        if config.args.is_a?(String)
-          args = " #{config.args}"
+        if config.args.is_a?(String) or config.args.is_a?(Fixnum)
+          args = " #{config.args.to_s}"
         elsif config.args.is_a?(Array)
-          args = config.args.map { |a| quote_and_escape(a) }
+          args = config.args.map { |a| quote_and_escape(a.to_s) }
           args = " #{args.join(" ")}"
         end
 
diff --git a/test/unit/plugins/provisioners/shell/config_test.rb b/test/unit/plugins/provisioners/shell/config_test.rb
index 2716afb43..8b05f452b 100644
--- a/test/unit/plugins/provisioners/shell/config_test.rb
+++ b/test/unit/plugins/provisioners/shell/config_test.rb
@@ -30,6 +30,16 @@ describe "VagrantPlugins::Shell::Config" do
       result["shell provisioner"].should == []
     end
 
+    it "passes with fixnum args" do
+      subject.path = file_that_exists
+      subject.args = 1
+      subject.finalize!
+
+      result = subject.validate(machine)
+
+      result["shell provisioner"].should == []
+    end
+
     it "passes with array args" do
       subject.path = file_that_exists
       subject.args = ["an", "array"]
@@ -53,5 +63,27 @@ describe "VagrantPlugins::Shell::Config" do
         I18n.t("vagrant.provisioners.shell.args_bad_type")
       ]
     end
+
+    it "handles scalar array args" do
+      subject.path = file_that_exists
+      subject.args = ["string", 1, 2]
+      subject.finalize!
+
+      result = subject.validate(machine)
+
+      result["shell provisioner"].should == []
+    end
+
+    it "returns an error if args is an array with non-scalar types" do
+      subject.path = file_that_exists
+      subject.args = [[1]]
+      subject.finalize!
+
+      result = subject.validate(machine)
+
+      result["shell provisioner"].should == [
+        I18n.t("vagrant.provisioners.shell.args_bad_type")
+      ]
+    end
   end
 end