diff --git a/src/components/material/StockStatus/types.ts b/src/components/material/StockStatus/types.ts
index 0e35a0b5..06a67fdc 100644
--- a/src/components/material/StockStatus/types.ts
+++ b/src/components/material/StockStatus/types.ts
@@ -64,7 +64,7 @@ export interface StockItem {
   actualQty: number;          // 실제 재고량 (Stock.actual_qty)
   stockQty: number;           // Stock.stock_qty (없으면 0)
   safetyStock: number;        // Stock.safety_stock (없으면 0)
-  maxStock: number;           // Stock.max_stock (없으면 0, 적정재고 상한)
+  maxStock?: number;           // Stock.max_stock (없으면 0, 적정재고 상한)
   wipQty: number;             // 재공품 수량 (Stock.wip_qty, 없으면 0)
   lotCount: number;           // Stock.lot_count (없으면 0)
   lotDaysElapsed: number;     // Stock.days_elapsed (없으면 0)
@@ -109,7 +109,7 @@ export interface StockDetail {
   // 재고 현황 (Stock - 없으면 기본값)
   currentStock: number;       // Stock.stock_qty
   safetyStock: number;        // Stock.safety_stock
-  maxStock: number;           // Stock.max_stock (적정재고 상한)
+  maxStock?: number;           // Stock.max_stock (적정재고 상한)
   location: string;           // Stock.location
   lotCount: number;           // Stock.lot_count
   lastReceiptDate: string;    // Stock.last_receipt_date