diff --git a/packages/frontend/src/scripts/device-kind.ts b/packages/frontend/src/scripts/device-kind.ts
index 544cac060..6bb349c55 100644
--- a/packages/frontend/src/scripts/device-kind.ts
+++ b/packages/frontend/src/scripts/device-kind.ts
@@ -4,7 +4,7 @@ const ua = navigator.userAgent.toLowerCase();
 const isTablet = /ipad/.test(ua) || (/mobile|iphone|android/.test(ua) && window.innerWidth > 700);
 const isSmartphone = !isTablet && /mobile|iphone|android/.test(ua);
 
-export const deviceKind = defaultStore.state.overridedDeviceKind ? defaultStore.state.overridedDeviceKind
+export const deviceKind: 'smartphone' | 'tablet' | 'desktop' = defaultStore.state.overridedDeviceKind ? defaultStore.state.overridedDeviceKind
 	: isSmartphone ? 'smartphone'
 	: isTablet ? 'tablet'
 	: 'desktop';