diff --git a/packages/reactivity/src/ref.ts b/packages/reactivity/src/ref.ts
index fd8ac821..0414ece2 100644
--- a/packages/reactivity/src/ref.ts
+++ b/packages/reactivity/src/ref.ts
@@ -85,7 +85,7 @@ export function triggerRef(ref: Ref) {
   trigger(toRaw(ref), TriggerOpTypes.SET, 'value', __DEV__ ? ref.value : void 0)
 }
 
-export function unref<T>(ref: T): T extends Ref<infer V> ? V : T {
+export function unref<T>(ref: T | Ref<T>): T {
   return isRef(ref) ? (ref.value as any) : ref
 }
 
diff --git a/test-dts/ref.test-d.ts b/test-dts/ref.test-d.ts
index a0887ca4..74bb7829 100644
--- a/test-dts/ref.test-d.ts
+++ b/test-dts/ref.test-d.ts
@@ -203,3 +203,10 @@ switch (data.state.value) {
     data.state.value = 'state1'
     break
 }
+
+// #3954
+function testUnrefGenerics<T>(p: T | Ref<T>) {
+  expectType<T>(unref(p))
+}
+
+testUnrefGenerics(1)