diff --git a/Slim/App.php b/Slim/App.php
index 7db72b758..529bdfa8b 100644
--- a/Slim/App.php
+++ b/Slim/App.php
@@ -9,6 +9,7 @@
 namespace Slim;
 
 use Exception;
+use Psr\Http\Message\UriInterface;
 use Slim\Exception\InvalidMethodException;
 use Slim\Http\Response;
 use Throwable;
diff --git a/Slim/Http/UploadedFile.php b/Slim/Http/UploadedFile.php
index 431ef2d3f..4bef0cae5 100644
--- a/Slim/Http/UploadedFile.php
+++ b/Slim/Http/UploadedFile.php
@@ -85,7 +85,7 @@ public static function createFromEnvironment(Environment $env)
     {
         if (is_array($env['slim.files']) && $env->has('slim.files')) {
             return $env['slim.files'];
-        } elseif (isset($_FILES)) {
+        } elseif (! empty($_FILES)) {
             return static::parseUploadedFiles($_FILES);
         }