diff --git a/lib/risc/position/instruction_listener.rb b/lib/risc/position/instruction_listener.rb
index 2dbc2de5..106fcb61 100644
--- a/lib/risc/position/instruction_listener.rb
+++ b/lib/risc/position/instruction_listener.rb
@@ -50,8 +50,11 @@ module Risc
       raise "Invalid negative index #{@index} ,  #{Position.get(@binary)}" if index < 0
     end
 
+    # update label positions. All else done in position_changing
     def position_changed(position)
-      #code moved to position_changing
+      instruction = position.object
+      return unless instruction.is_a?(Label)
+      instruction.address.set_value(position.at)
     end
 
     # When this is called, only the actual insert has happened (keeping the
diff --git a/test/risc/position/test_instruction_listener.rb b/test/risc/position/test_instruction_listener.rb
index 45d57f1e..8be17ff9 100644
--- a/test/risc/position/test_instruction_listener.rb
+++ b/test/risc/position/test_instruction_listener.rb
@@ -10,6 +10,13 @@ module Risc
       @instruction = DummyInstruction.new(DummyInstruction.new)
       @position = InstructionListener.init(@instruction , @binary)
     end
+    def test_label_address
+      label = Label.new("hi" ,"ho" , FakeAddress.new(0))
+      label_pos = Position.new( label , -1 )
+      label_pos.position_listener(InstructionListener.new(@binary))
+      label_pos.set(8)
+      assert_equal 8 , label_pos.object.address.value
+    end
     def test_init
       assert InstructionListener.init(@instruction , @binary)
     end
diff --git a/test/risc/test_interpreter.rb b/test/risc/test_interpreter.rb
index 96f630c0..7ab407f8 100644
--- a/test/risc/test_interpreter.rb
+++ b/test/risc/test_interpreter.rb
@@ -52,7 +52,7 @@ module Risc
     end
     def test_pc1
       @interpreter.tick
-      assert_equal 20172 , @interpreter.pc
+      assert_equal 20344 , @interpreter.pc
     end
     def test_tick2
       @interpreter.tick
@@ -66,22 +66,26 @@ module Risc
     def test_pc2
       @interpreter.tick
       @interpreter.tick
-      assert_equal 20176 , @interpreter.pc
+      assert_equal 20348 , @interpreter.pc
     end
-    def pest_tick_14_jump
+    def test_tick_14_jump
       14.times {@interpreter.tick}
       assert_equal Branch , @interpreter.instruction.class
     end
-    def pest_tick_14_bin
+    def test_tick_14_bin
       13.times {@interpreter.tick}
       binary_pos = binary_position
+      @interpreter.tick #jump has no listener
       @interpreter.tick
-      assert_equal binary_pos , binary_position , "#{binary_pos.to_s(16)}!=#{binary_position.to_s(16)}"
+      assert binary_pos.at != binary_position.at , "#{binary_pos}!=#{binary_position}"
     end
     def binary_position
-      Position.get(Position.get(@interpreter.instruction).binary).at
+      pos = Position.get(@interpreter.instruction)
+      list = pos.event_table[:position_changed].first
+      assert_equal InstructionListener, list.class
+      Position.get(list.binary)
     end
-    def pest_tick_15 #more than a binary code worth
+    def test_tick_15 #more than a binary code worth
       15.times {@interpreter.tick}
     end
   end