diff --git a/src/factory/createReducer.ts b/src/factory/createReducer.ts
index ef2af42efc..8489d9548a 100644
--- a/src/factory/createReducer.ts
+++ b/src/factory/createReducer.ts
@@ -1,7 +1,7 @@
 import { MutableRefObject, useCallback, useRef, useState } from 'react';
 import useUpdateEffect from '../useUpdateEffect';
 
-type Dispatch<Action> = (action: Action) => void;
+type Dispatch<Action> = (action: Action) => Action;
 
 interface Store<Action, State> {
   getState: () => State;
diff --git a/src/useDeepCompareEffect.ts b/src/useDeepCompareEffect.ts
index 14c08c4ff0..f08c92228a 100644
--- a/src/useDeepCompareEffect.ts
+++ b/src/useDeepCompareEffect.ts
@@ -2,8 +2,6 @@ import { DependencyList, EffectCallback } from 'react';
 import useCustomCompareEffect from './useCustomCompareEffect';
 import isDeepEqual from './misc/isDeepEqual';
 
-const isPrimitive = (val: any) => val !== Object(val);
-
 const useDeepCompareEffect = (effect: EffectCallback, deps: DependencyList) => {
   if (process.env.NODE_ENV !== 'production') {
     if (!(deps instanceof Array) || !deps.length) {
@@ -11,12 +9,6 @@ const useDeepCompareEffect = (effect: EffectCallback, deps: DependencyList) => {
         '`useDeepCompareEffect` should not be used with no dependencies. Use React.useEffect instead.'
       );
     }
-
-    if (deps.every(isPrimitive)) {
-      console.warn(
-        '`useDeepCompareEffect` should not be used with dependencies that are all primitive values. Use React.useEffect instead.'
-      );
-    }
   }
 
   useCustomCompareEffect(effect, deps, isDeepEqual);