diff --git a/src/ViewManager.php b/src/ViewManager.php
index 3ec28752..7f310331 100644
--- a/src/ViewManager.php
+++ b/src/ViewManager.php
@@ -61,7 +61,7 @@ public function addEngine(EngineInterface $engine): void
     {
         $this->engines[] = $engine->withLoader($this->loader);
 
-        \uasort($this->engines, static fn (EngineInterface $a, EngineInterface $b) => \strcmp(
+        \uasort($this->engines, static fn (EngineInterface $a, EngineInterface $b): int => \strcmp(
             $a->getLoader()->getExtension() ?? '',
             $b->getLoader()->getExtension() ?? ''
         ));