diff --git a/lib/risc.rb b/lib/risc.rb
index 7bb1654f..62a9646e 100644
--- a/lib/risc.rb
+++ b/lib/risc.rb
@@ -37,5 +37,5 @@ end
 require_relative "risc/instruction"
 require_relative "risc/risc_value"
 require_relative "risc/text_writer"
-require_relative "risc/builtin/space"
+require_relative "risc/builtin"
 require_relative "risc/builder"
diff --git a/lib/risc/boot.rb b/lib/risc/boot.rb
index f1315fc6..49e62c18 100644
--- a/lib/risc/boot.rb
+++ b/lib/risc/boot.rb
@@ -60,7 +60,7 @@ module Risc
       Parfait.set_object_space( space )
 
       #puts Rfx.write(space)
-      boot_functions( space )
+      Builtin.boot_functions( )
     end
 
     # types is where the snake bites its tail. Every chain ends at a type and then it
@@ -159,36 +159,5 @@ module Risc
         }
     end
 
-    # classes have booted, now create a minimal set of functions
-    # minimal means only that which can not be coded in ruby
-    # Methods are grabbed from respective modules by sending the method name. This should return the
-    # implementation of the method (ie a method object), not actually try to implement it
-    #                                                     (as that's impossible in ruby)
-    def boot_functions( space )
-      # very fiddly chicken 'n egg problem. Functions need to be in the right order, and in fact we
-      # have to define some dummies, just for the others to compile
-      # TODO go through the virtual parfait layer and adjust function names to what they really are
-      space_class = space.get_class
-      space_class.instance_type.add_method Builtin::Space.send(:main, nil)
-
-      obj = space.get_class_by_name(:Object)
-      [ :get_internal_word , :set_internal_word , :_method_missing,
-        :exit , :__init__].each do |f|
-        obj.instance_type.add_method Builtin::Object.send(f , nil)
-      end
-
-      obj = space.get_class_by_name(:Word)
-      [:putstring , :get_internal_byte , :set_internal_byte ].each do |f|
-        obj.instance_type.add_method Builtin::Word.send(f , nil)
-      end
-
-      obj = space.get_class_by_name(:Integer)
-      Risc.operators.each do |op|
-        obj.instance_type.add_method Builtin::Integer.operator_method(op)
-      end
-      [:putint, :div4, :div10 , :<,:<= , :>=, :>].each do |f|   #div4 is just a forward declaration
-        obj.instance_type.add_method Builtin::Integer.send(f , nil)
-      end
-    end
   end
 end
diff --git a/lib/risc/builtin.rb b/lib/risc/builtin.rb
new file mode 100644
index 00000000..feb2fd77
--- /dev/null
+++ b/lib/risc/builtin.rb
@@ -0,0 +1,44 @@
+require_relative "builtin/compile_helper"
+require_relative "builtin/space"
+require_relative "builtin/integer"
+require_relative "builtin/object"
+require_relative "builtin/word"
+
+module Risc
+  module Builtin
+    # classes have booted, now create a minimal set of functions
+    # minimal means only that which can not be coded in ruby
+    # Methods are grabbed from respective modules by sending the method name.
+    # This should return the implementation of the method (ie a method object),
+    # not actually try to implement it(as that's impossible in ruby)
+    #
+    def self.boot_functions( )
+      space = Parfait.object_space
+      # very fiddly chicken 'n egg problem. Functions need to be in the right order, and in fact we
+      # have to define some dummies, just for the others to compile
+      # TODO go through the virtual parfait layer and adjust function names to what they really are
+      space_class = space.get_class
+      space_class.instance_type.add_method Builtin::Space.send(:main, nil)
+
+      obj = space.get_class_by_name(:Object)
+      [ :get_internal_word , :set_internal_word , :_method_missing,
+        :exit , :__init__].each do |f|
+        obj.instance_type.add_method Builtin::Object.send(f , nil)
+      end
+
+      obj = space.get_class_by_name(:Word)
+      [:putstring , :get_internal_byte , :set_internal_byte ].each do |f|
+        obj.instance_type.add_method Builtin::Word.send(f , nil)
+      end
+
+      obj = space.get_class_by_name(:Integer)
+      Risc.operators.each do |op|
+        obj.instance_type.add_method Builtin::Integer.operator_method(op)
+      end
+      [:putint, :div4, :div10 , :<,:<= , :>=, :>].each do |f|   #div4 is just a forward declaration
+        obj.instance_type.add_method Builtin::Integer.send(f , nil)
+      end
+    end
+
+  end
+end
diff --git a/lib/risc/builtin/space.rb b/lib/risc/builtin/space.rb
index ccfe9758..3a236fb3 100644
--- a/lib/risc/builtin/space.rb
+++ b/lib/risc/builtin/space.rb
@@ -1,11 +1,8 @@
-require "ast/sexp"
-require_relative "compile_helper"
 
 module Risc
   module Builtin
     class Space
       module ClassMethods
-        include AST::Sexp
         include CompileHelper
 
         # main entry point, ie __init__ calls this
@@ -21,7 +18,3 @@ module Risc
     end
   end
 end
-
-require_relative "integer"
-require_relative "object"
-require_relative "word"