diff --git a/web/gui2/src/main/webapp/app/fw/util/theme.service.ts b/web/gui2/src/main/webapp/app/fw/util/theme.service.ts
index 884fe5d..e5c9564 100644
--- a/web/gui2/src/main/webapp/app/fw/util/theme.service.ts
+++ b/web/gui2/src/main/webapp/app/fw/util/theme.service.ts
@@ -23,7 +23,7 @@
 @Injectable()
 export class ThemeService {
     themes: string[] = ['light', 'dark'];
-    thidx: number = 0;
+    thidx = 0;
 
     constructor(
         private log: LogService