diff --git a/Step/wwwroot/src/store/machineInfo.store.ts b/Step/wwwroot/src/store/machineInfo.store.ts
index 37188524..6b0b6949 100644
--- a/Step/wwwroot/src/store/machineInfo.store.ts
+++ b/Step/wwwroot/src/store/machineInfo.store.ts
@@ -21,7 +21,7 @@ export interface MachineInfoModel {
   isFanuc?: boolean,
   isOsai?: boolean,
   canChangePages?: boolean,
-  isSCMVisualStyle: boolean,
+  isSCMVisualStyle?: boolean,
 
   defaultLanguage?: string,
   clientDefaultLanguage?: string,