diff --git a/module/rdd-combat.js b/module/rdd-combat.js
index 506148fa..49b948d0 100644
--- a/module/rdd-combat.js
+++ b/module/rdd-combat.js
@@ -503,7 +503,7 @@ export class RdDCombat {
         ui.notifications.error("Le joueur " + game.user.name + " n'est connecté à aucun personnage. Impossible de continuer.");
         return;
       }
-      if ((game.user.isGM && !defenderToken.actor.hasPlayerOwner) || (defenderToken.actor.hasPlayerOwner && (game.user.character._id == defenderToken.actor.data._id))) {
+      if ((game.user.isGM && !defenderToken.actor.hasPlayerOwner) || (defenderToken.actor.hasPlayerOwner && (game.user.character?._id == defenderToken.actor.data._id))) {
         const rddCombat = RdDCombat.createForAttackerAndDefender(msg.attackerId, msg.defenderTokenId);
         if (rddCombat) {
           const defenderRoll = msg.defenderRoll;