diff --git a/router/src/main/java/io/micronaut/web/router/Router.java b/router/src/main/java/io/micronaut/web/router/Router.java
index 1dfbe74d81..0b2a23d851 100644
--- a/router/src/main/java/io/micronaut/web/router/Router.java
+++ b/router/src/main/java/io/micronaut/web/router/Router.java
@@ -150,7 +150,7 @@ default  <T, R> Stream<UriRouteMatch<T, R>> find(@NonNull HttpRequest<?> request
      * @return A match or null, throws {@link DuplicateRouteException} on multiple routes.
      * @since 4.0.0
      */
-    @NonNull
+    @Nullable
     default <T, R> UriRouteMatch<T, R> findClosest(@NonNull HttpRequest<?> request) throws DuplicateRouteException {
         List<UriRouteMatch<T, R>> uriRoutes = findAllClosest(request);
         if (uriRoutes.size() > 1) {