diff --git a/src/components/TourGuideContext.ts b/src/components/TourGuideContext.ts
index 4d92c1ef..e414a0c6 100644
--- a/src/components/TourGuideContext.ts
+++ b/src/components/TourGuideContext.ts
@@ -9,7 +9,7 @@ export interface Emitter {
 }
 export type Ctx<T extends any> = Record<string, T> & { _default: T }
 
-export type ITourGuideContext = {
+export interface ITourGuideContext {
   setTourKey?: (tourKey: string) => void
   eventEmitter?: Ctx<Emitter>
   canStart: Ctx<boolean>
diff --git a/src/hooks/useTourGuideController.tsx b/src/hooks/useTourGuideController.tsx
index 19879320..d6db52d1 100644
--- a/src/hooks/useTourGuideController.tsx
+++ b/src/hooks/useTourGuideController.tsx
@@ -10,10 +10,12 @@ export const useTourGuideController = (tourKey?: string) => {
   const { start, canStart, stop, eventEmitter, getCurrentStep, setTourKey } =
     React.useContext(TourGuideContext)
 
-  let key = tourKey ?? '_default'
+  const key = tourKey ?? '_default'
 
   const _start = (fromStep?: number) => {
-    setTourKey && setTourKey(key)
+    if (setTourKey) {
+      setTourKey(key)
+    }
     if (start) {
       start(key, fromStep)
     }
@@ -33,7 +35,9 @@ export const useTourGuideController = (tourKey?: string) => {
   }
 
   React.useEffect(() => {
-    setTourKey && setTourKey(key)
+    if (setTourKey) {
+      setTourKey(key)
+    }
   }, [])
 
   const KeyedTourGuideZone: React.FC<Omit<TourGuideZoneProps, 'tourKey'>> =