diff --git a/lib/mom/mom_compiler.rb b/lib/mom/mom_compiler.rb
index 3ac3b552..17160ad7 100644
--- a/lib/mom/mom_compiler.rb
+++ b/lib/mom/mom_compiler.rb
@@ -3,7 +3,12 @@ module Mom
     attr_reader :method_compilers
 
     def initialize(compilers = [])
-      @method_compilers = Risc::Builtin.boot_functions + compilers
+      @method_compilers = compilers
+      Risc::Builtin.boot_functions.each do |boot_comp|
+        next if @method_compilers.find{|comp| comp.method == boot_comp.method }        
+        @method_compilers << boot_comp
+      end
+
     end
 
     # collects constants from all compilers into one array
diff --git a/lib/parfait/typed_method.rb b/lib/parfait/typed_method.rb
index 2512ba10..964527fa 100644
--- a/lib/parfait/typed_method.rb
+++ b/lib/parfait/typed_method.rb
@@ -32,6 +32,12 @@ module Parfait
       init(arguments_type, frame_type)
     end
 
+    def ==(other)
+      return false unless other.is_a?(TypedMethod)
+      return false if @name != other.name
+      @for_type == other.for_type
+    end
+
     # (re) init with given args and frame types
     def init(arguments_type, frame_type)
       raise "Wrong argument type, expect Type not #{arguments_type.class}" unless arguments_type.is_a? Type
diff --git a/test/mom/test_mom_compiler.rb b/test/mom/test_mom_compiler.rb
index 3c58504a..c1285312 100644
--- a/test/mom/test_mom_compiler.rb
+++ b/test/mom/test_mom_compiler.rb
@@ -15,6 +15,9 @@ module Mom
     def test_compilers
       assert_equal 24 , @comp.method_compilers.length
     end
+    def test_compilers_bare
+      assert_equal 23 , MomCompiler.new.method_compilers.length
+    end
     def test_returns_constants
       assert_equal Array , @comp.constants.class
     end
diff --git a/test/mom/test_mom_compiler1.rb b/test/mom/test_mom_compiler1.rb
index 917d8add..5618960d 100644
--- a/test/mom/test_mom_compiler1.rb
+++ b/test/mom/test_mom_compiler1.rb
@@ -32,7 +32,7 @@ module Mom
       assert_equal Risc::Label , @linker.assemblers.first.instructions.class
     end
     def test_assembler_assembled
-      assert_equal Risc::SlotToReg , @linker.assemblers.first.instructions.next.class
+      assert_equal Risc::LoadConstant , @linker.assemblers.first.instructions.next.class
     end
     def test_no_loops_in_chain
       @linker.assemblers.each do |asm|
diff --git a/test/parfait/test_typed_method.rb b/test/parfait/test_typed_method.rb
index ac5fa672..2e0638e0 100644
--- a/test/parfait/test_typed_method.rb
+++ b/test/parfait/test_typed_method.rb
@@ -5,10 +5,10 @@ module Parfait
 
     def setup
       super
-      obj = Parfait.object_space.get_class_by_name(:Object).instance_type
-      args = Parfait::Type.for_hash( obj.object_class , { bar: :Integer , foo: :Type})
-      frame = Parfait::Type.for_hash( obj.object_class , { local_bar: :Integer , local_foo: :Type})
-      @method = Parfait::TypedMethod.new( obj , :meth , args , frame)
+      @obj = Parfait.object_space.get_class_by_name(:Object).instance_type
+      @args = Parfait::Type.for_hash( @obj.object_class , { bar: :Integer , foo: :Type})
+      @frame = Parfait::Type.for_hash( @obj.object_class , { local_bar: :Integer , local_foo: :Type})
+      @method = Parfait::TypedMethod.new( @obj , :meth , @args , @frame)
     end
 
     def test_method_name
@@ -95,5 +95,12 @@ module Parfait
     def test_created_with_binary
       assert @method.binary
     end
+    def test_equal
+      assert_equal @method , @method
+    end
+    def test_not_equal
+      method = Parfait::TypedMethod.new( @obj , :other , @args , @frame)
+      assert @method != method
+    end
   end
 end