diff --git a/src/controllers/custom/completeAllMissionsController.ts b/src/controllers/custom/completeAllMissionsController.ts
index 569866b6..9e7afbb0 100644
--- a/src/controllers/custom/completeAllMissionsController.ts
+++ b/src/controllers/custom/completeAllMissionsController.ts
@@ -23,7 +23,7 @@ export const completeAllMissionsController: RequestHandler = async (req, res) =>
             if (node.missionReward) {
                 addFixedLevelRewards(node.missionReward, inventory, MissionRewards);
             }
-        } else if (mission.Tier == undefined) {
+        } else if (!mission.Tier) {
             mission.Tier = 1;
         }
     }