diff --git a/Gemfile.lock b/Gemfile.lock
index 39efa2dc..1f8d08e5 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -12,7 +12,7 @@ GIT
 
 GIT
   remote: git://github.com/salama/salama-reader.git
-  revision: e8bc570d2530e501a08ed35eb5b6fac26dc78309
+  revision: 34691f36d13f68d2c39cea266f26ea201bc78bb6
   specs:
     salama-reader (0.2.0)
       ast (~> 2.1.0)
diff --git a/lib/bosl/compiler/class_field.rb b/lib/bosl/compiler/class_field.rb
new file mode 100644
index 00000000..3eacc1d0
--- /dev/null
+++ b/lib/bosl/compiler/class_field.rb
@@ -0,0 +1,22 @@
+module Bosl
+  Compiler.class_eval do
+
+    def on_class_field expression
+      puts expression.inspect
+      type , name , value = *expression
+
+      for_class = self.method.for_class
+      index = for_class.object_layout.variable_index(name)
+      raise "class field already defined:#{name} for class #{for_class.name}" if index
+      puts "Define field #{name} on class #{for_class.name}"
+      index = for_class.object_layout.add_instance_variable( name ) #TODO need typing
+
+      if value
+        value = process( value  )
+        raise "value #{value}" #tbc
+      end
+
+      Virtual::Return.new( index )
+    end
+  end
+end