diff --git a/lib/patcher/src/hooks/after.ts b/lib/patcher/src/hooks/after.ts
index 5749c74..a4b253b 100644
--- a/lib/patcher/src/hooks/after.ts
+++ b/lib/patcher/src/hooks/after.ts
@@ -4,7 +4,12 @@ import {
     unproxy,
 } from '../_internal'
 import type { HookNode, PatchedFunctionProxyState } from '../_internal'
-import type { AfterHook, FiniteDomain, UnknownFunction } from '../types'
+import type {
+    AfterHook,
+    FiniteDomain,
+    UnknownFunction,
+    UnpatchFunction,
+} from '../types'
 
 function unpatchAfter<T extends UnknownFunction>(
     state: PatchedFunctionProxyState<PropertyKey, T>,
@@ -63,12 +68,12 @@ function unpatchAfter<T extends UnknownFunction>(
 export function after<
     Parent extends Record<Key, UnknownFunction>,
     Key extends keyof Parent,
->(parent: Parent, key: Key, hook: AfterHook<Parent[Key]>): () => void
+>(parent: Parent, key: Key, hook: AfterHook<Parent[Key]>): UnpatchFunction
 export function after<Key extends PropertyKey, Value extends UnknownFunction>(
     parent: Record<Key, Value>,
     key: FiniteDomain<Key>,
     hook: AfterHook<Value>,
-) {
+): UnpatchFunction {
     const target = parent[key]
 
     let state = patchedFunctionProxyStates.get(target)
diff --git a/lib/patcher/src/hooks/before.ts b/lib/patcher/src/hooks/before.ts
index 79b67f8..6b0a858 100644
--- a/lib/patcher/src/hooks/before.ts
+++ b/lib/patcher/src/hooks/before.ts
@@ -4,7 +4,12 @@ import {
     unproxy,
 } from '../_internal'
 import type { HookNode, PatchedFunctionProxyState } from '../_internal'
-import type { BeforeHook, FiniteDomain, UnknownFunction } from '../types'
+import type {
+    BeforeHook,
+    FiniteDomain,
+    UnknownFunction,
+    UnpatchFunction,
+} from '../types'
 
 function unpatchBefore<T extends UnknownFunction>(
     state: PatchedFunctionProxyState<PropertyKey, T>,
@@ -63,12 +68,12 @@ function unpatchBefore<T extends UnknownFunction>(
 export function before<
     Parent extends Record<Key, UnknownFunction>,
     Key extends keyof Parent,
->(parent: Parent, key: Key, hook: BeforeHook<Parent[Key]>): () => void
+>(parent: Parent, key: Key, hook: BeforeHook<Parent[Key]>): UnpatchFunction
 export function before<Key extends PropertyKey, Value extends UnknownFunction>(
     parent: Record<Key, Value>,
     key: FiniteDomain<Key>,
     hook: BeforeHook<Value>,
-) {
+): UnpatchFunction {
     const target = parent[key]
 
     let state = patchedFunctionProxyStates.get(target)
diff --git a/lib/patcher/src/hooks/instead.ts b/lib/patcher/src/hooks/instead.ts
index 9d01689..478bad4 100644
--- a/lib/patcher/src/hooks/instead.ts
+++ b/lib/patcher/src/hooks/instead.ts
@@ -15,6 +15,7 @@ import type {
     FiniteDomain,
     InsteadHook,
     UnknownFunction,
+    UnpatchFunction,
 } from '../types'
 
 const insteadHookProxyHandler = {
@@ -110,12 +111,12 @@ function unpatchInstead<T extends UnknownFunction>(
 export function instead<
     Parent extends Record<Key, UnknownFunction>,
     Key extends keyof Parent,
->(parent: Parent, key: Key, hook: InsteadHook<Parent[Key]>): () => void
+>(parent: Parent, key: Key, hook: InsteadHook<Parent[Key]>): UnpatchFunction
 export function instead<Key extends PropertyKey, Value extends UnknownFunction>(
     parent: Record<Key, Value>,
     key: FiniteDomain<Key>,
     hook: InsteadHook<Value>,
-) {
+): UnpatchFunction {
     const target = parent[key]
 
     let state = patchedFunctionProxyStates.get(target)
diff --git a/lib/patcher/src/types.ts b/lib/patcher/src/types.ts
index 78f75e7..5755f1f 100644
--- a/lib/patcher/src/types.ts
+++ b/lib/patcher/src/types.ts
@@ -222,3 +222,5 @@ export type OverloadUnionNewableInner<
                 ConcreteNewable<Args, Return>
             >
       : never
+
+export type UnpatchFunction = () => void