diff --git a/packages/next-auth/src/react/index.tsx b/packages/next-auth/src/react/index.tsx
index b2003c054d..30f23e51ce 100644
--- a/packages/next-auth/src/react/index.tsx
+++ b/packages/next-auth/src/react/index.tsx
@@ -175,7 +175,7 @@ export async function getProviders() {
 export async function signIn<
   P extends RedirectableProviderType | undefined = undefined
 >(
-  provider?: LiteralUnion<BuiltInProviderType>,
+  provider?: LiteralUnion<P | BuiltInProviderType>,
   options?: SignInOptions,
   authorizationParams?: SignInAuthorizationParams
 ): Promise<