diff --git a/lib/register/collector.rb b/lib/register/collector.rb
index 88bfafa1..a453eb20 100644
--- a/lib/register/collector.rb
+++ b/lib/register/collector.rb
@@ -6,6 +6,7 @@ module Register
       # init= Parfait::Space.object_space.get_class_by_name("Kernel").get_instance_method "__init__"
       self.objects.clear
       keep Parfait::Space.object_space , 0
+      constants.each {|o| keep(o,0)}
     end
 
     def keep object , depth
@@ -14,12 +15,6 @@ module Register
       #puts "ADD #{object.first.class}, #{object.last.class}" if object.is_a? Array
       return unless self.add_object object
       return unless object.respond_to? :has_layout?
-      if( object.is_a? Parfait::Method)
-        object.source.constants.each{|c|
-          #puts "keeping constant #{c.class}:#{c.object_id}"
-          keep(c , depth + 1)
-        }
-      end
       layout = object.get_layout
       keep(layout  , depth + 1)
       return if object.is_a? Symbol
diff --git a/lib/register/machine.rb b/lib/register/machine.rb
index dd761d2e..596809de 100644
--- a/lib/register/machine.rb
+++ b/lib/register/machine.rb
@@ -17,7 +17,9 @@ module Register
       @parser  = Parser::Salama.new
       @objects = {}
       @booted = false
+      @constants = []
     end
+    attr_reader    :constants
     attr_reader :space , :class_mappings , :init , :objects , :booted
 
 
diff --git a/lib/register/method_source.rb b/lib/register/method_source.rb
index 4e7459dd..4fb68222 100644
--- a/lib/register/method_source.rb
+++ b/lib/register/method_source.rb
@@ -55,9 +55,7 @@ module Register
       #load the return address into pc, affecting return. (other cpus have commands for this, but not arm)
       add_code FunctionReturn.new( self , Register.new_message_reg , Register.resolve_index(:message , :return_address) )
       @current = enter
-      @constants = []
     end
-    attr_reader    :constants
     attr_accessor  :current , :receiver , :instructions
 
     # add an instruction after the current (insertion point)
diff --git a/lib/soml/compiler/basic_values.rb b/lib/soml/compiler/basic_values.rb
index a0470f77..4120ea0c 100644
--- a/lib/soml/compiler/basic_values.rb
+++ b/lib/soml/compiler/basic_values.rb
@@ -38,7 +38,7 @@ module Soml
     def on_string expression
       value = expression.first.to_sym
       reg = use_reg :Word
-      @method.source.constants << value
+      Register.machine.constants << value
       add_code Register::LoadConstant.new( expression, value , reg )
       return reg
     end