diff --git a/machine_player.py b/machine_player.py
index 3336395..19a0371 100644
--- a/machine_player.py
+++ b/machine_player.py
@@ -79,9 +79,9 @@ class MachinePlayer(APlayer):
         next_move = best_move
         is_exp = False
         if uniform() < self.p_exp:
-            is_exp = True
             index = np.random.randint(len(moves))
             next_move = moves[index]
+            is_exp = best_move != next_move
         elif do_sample:
             index = sample(values)
             next_move = moves[index]