diff --git a/M01_MasterData/EasyCalc/M01_EasyCalc_Pick.ts b/M01_MasterData/EasyCalc/M01_EasyCalc_Pick.ts
index e08cb5e85..a7b9bc8cb 100644
--- a/M01_MasterData/EasyCalc/M01_EasyCalc_Pick.ts
+++ b/M01_MasterData/EasyCalc/M01_EasyCalc_Pick.ts
@@ -137,10 +137,12 @@ const SOURCES: Partial<Record<Kind, Source>> = {
               .filter((it) => !f.sub || (it as { 구분?: string }).구분 === f.sub)
               .map((it) => ({ ...it, 구분: (it as { 구분?: string }).구분, 상세구분: undefined })),
           }))
-        : await fetchMaterials({ sub: f.sub, detail: f.detail || undefined }).then((r) => ({
-            total: r.total,
-            items: r.items.map((it) => ({ ...it, 구분: it.구분 ?? f.sub })),
-          }));
+        : await fetchMaterials({ sub: f.sub, ...(f.detail ? { detail: f.detail } : {}) }).then(
+            (r) => ({
+              total: r.total,
+              items: r.items.map((it) => ({ ...it, 구분: it.구분 ?? f.sub })),
+            }),
+          );
       return {
         total: found.total,
         items: found.items.map((it) => {
@@ -149,7 +151,7 @@ const SOURCES: Partial<Record<Kind, Source>> = {
           const unit = typeof it.단위 === "string" ? it.단위 : "";
           const price = num(it.값);
           const element: Record<string, string> = { 구분: it.구분 ?? f.sub };
-          const detail = (it as { 상세구분?: string }).상세구분 ?? f.detail;
+          const detail = (it as { 상세구분?: string }).상세구분;
           if (detail) element["상세구분"] = detail;
           element["검색어"] = `${name} ${spec}`.trim();
           return {