diff --git a/game_theory_of_life.py b/game_theory_of_life.py
index a867be4..eb5e73b 100644
--- a/game_theory_of_life.py
+++ b/game_theory_of_life.py
@@ -21,7 +21,7 @@ for pos_y in range(0, mapa.dimensao[0]):
 for pos_y in range(0, mapa.dimensao[0]):
     for pos_x in range(0, mapa.dimensao[1]):
         tmp_agente: Agente | None = mapa.posicao((pos_y, pos_x))
-        if tmp_agente is not None:
+        if type(tmp_agente) is not None:
             print(f"{tmp_agente.estrategia[0]:2}", end='')
     print("")