diff --git a/lib/slot_machine/macro/comparison.rb b/lib/slot_machine/macro/comparison.rb
index 7b387824..f5297feb 100644
--- a/lib/slot_machine/macro/comparison.rb
+++ b/lib/slot_machine/macro/comparison.rb
@@ -32,7 +32,7 @@ module SlotMachine
           left.op :- , right
         end
         if_minus false_label
-        if_not_zero( false_label ) if operator.to_s.length == 1
+        if_zero( false_label ) if operator.to_s.length == 1
         add_code Risc::LoadConstant.new(to_s , Parfait.object_space.true_object, result)
         branch merge_label
         add_code false_label
diff --git a/test/risc/interpreter/builtin/test_int_cmp.rb b/test/risc/interpreter/builtin/test_int_cmp.rb
index 732b4abd..2adbf11f 100644
--- a/test/risc/interpreter/builtin/test_int_cmp.rb
+++ b/test/risc/interpreter/builtin/test_int_cmp.rb
@@ -32,7 +32,6 @@ module Risc
         run_main_return "5 > 5"
         assert_equal Parfait::FalseClass , get_message_return.class
       end
-
       def test_smaller_or_true
         run_main_return "4 <= 5"
         assert_equal Parfait::TrueClass , get_message_return.class
diff --git a/test/slot_machine/macro/test_comparison.rb b/test/slot_machine/macro/test_comparison.rb
index 1296fc59..0fb4b496 100644
--- a/test/slot_machine/macro/test_comparison.rb
+++ b/test/slot_machine/macro/test_comparison.rb
@@ -38,7 +38,7 @@ module SlotMachine
         assert_slot_to_reg 4 , "message.arg1" , 2 , "message.arg1.data_1"
         assert_operator 5 , :- , "message.receiver.data_1" , "message.arg1.data_1" ,"op_-_"
         assert_minus 6 , "false_label_"
-        assert_not_zero 7 , "false_label_"
+        assert_zero 7 , "false_label_"
         assert_load 8 , Parfait::TrueClass , :result
         assert_branch 9 , "merge_label_"
         assert_label 10 , "false_label_"