diff --git a/extensions/zai/model-definitions.ts b/extensions/zai/model-definitions.ts
index b07e6289273..c5a4e043308 100644
--- a/extensions/zai/model-definitions.ts
+++ b/extensions/zai/model-definitions.ts
@@ -43,7 +43,9 @@ export function resolveZaiBaseUrl(endpoint?: string): string {
 }
 
 export function buildZaiCatalogModels(): ModelDefinitionConfig[] {
-  return ZAI_MANIFEST_PROVIDER.models.map((model) => ({ ...model, input: [...model.input] }));
+  return ZAI_MANIFEST_PROVIDER.models.map((model) =>
+    Object.assign({}, model, { input: [...model.input] }),
+  );
 }
 
 export function buildZaiModelDefinition(params: {