diff --git a/packages/rxjs/useExtractedObservable/index.ts b/packages/rxjs/useExtractedObservable/index.ts
index 726763d9839..6748e318463 100644
--- a/packages/rxjs/useExtractedObservable/index.ts
+++ b/packages/rxjs/useExtractedObservable/index.ts
@@ -95,7 +95,7 @@ export function useExtractedObservable<T = any, E = unknown, Immediate extends R
   // Construct it first so that the `watch` can override the value if the observable emits immediately
   const obsRef = shallowRef<E | undefined>(options?.initialValue)
 
-  watch(source as any, (value, oldValue, onCleanup) => {
+  watch(source as WatchSource<T>, (value, oldValue, onCleanup) => {
     subscription?.unsubscribe()
 
     if (typeof value !== 'undefined' && value !== null) {
diff --git a/packages/rxjs/watchExtractedObservable/index.ts b/packages/rxjs/watchExtractedObservable/index.ts
index d6d3823e058..982c88cfb5d 100644
--- a/packages/rxjs/watchExtractedObservable/index.ts
+++ b/packages/rxjs/watchExtractedObservable/index.ts
@@ -99,7 +99,7 @@ export function watchExtractedObservable<T = any, E = unknown, Immediate extends
     subscription = undefined
   })
 
-  return watch(source as any, (value, oldValue, onCleanup) => {
+  return watch(source as WatchSource<T>, (value, oldValue, onCleanup) => {
     subscription?.unsubscribe()
 
     if (typeof value !== 'undefined' && value !== null) {
diff --git a/packages/shared/watchDeep/index.ts b/packages/shared/watchDeep/index.ts
index 0a80cdbb19e..da30ad57cf6 100644
--- a/packages/shared/watchDeep/index.ts
+++ b/packages/shared/watchDeep/index.ts
@@ -35,7 +35,7 @@ export function watchDeep<
  */
 export function watchDeep<T = any, Immediate extends Readonly<boolean> = false>(source: T | WatchSource<T>, cb: any, options?: Omit<WatchOptions<Immediate>, 'deep'>) {
   return watch(
-    source as any,
+    source as WatchSource<T>,
     cb,
     {
       ...options,
diff --git a/packages/shared/watchImmediate/index.ts b/packages/shared/watchImmediate/index.ts
index 1caf4fb86b8..476d26850b5 100644
--- a/packages/shared/watchImmediate/index.ts
+++ b/packages/shared/watchImmediate/index.ts
@@ -29,7 +29,7 @@ export function watchImmediate<T extends object>(
  */
 export function watchImmediate<T = any>(source: T, cb: any, options?: Omit<WatchOptions, 'immediate'>) {
   return watch(
-    source as any,
+    source as WatchSource<T>,
     cb,
     {
       ...options,
diff --git a/packages/shared/watchOnce/index.ts b/packages/shared/watchOnce/index.ts
index 0abb9db30fa..490b101eea9 100644
--- a/packages/shared/watchOnce/index.ts
+++ b/packages/shared/watchOnce/index.ts
@@ -28,7 +28,7 @@ export function watchOnce<T extends object>(
  */
 export function watchOnce<T = any>(source: T, cb: any, options?: Omit<WatchOptions, 'once'>) {
   return watch(
-    source as any,
+    source as WatchSource<T>,
     cb,
     {
       ...options,