diff --git a/packages/framework/src/Support/Includes.php b/packages/framework/src/Support/Includes.php
index 125ea80b484..e523807d751 100644
--- a/packages/framework/src/Support/Includes.php
+++ b/packages/framework/src/Support/Includes.php
@@ -94,7 +94,7 @@ public static function markdown(string $filename, ?string $default = null): ?Htm
         return static::getInclude([static::class, 'renderMarkdown'], $filename, $default, '.md');
     }
 
-    protected static function getInclude(callable $method, string $filename, ?string $default, string $extension): ?HtmlString
+    protected static function getInclude(callable $method, string $filename, ?string $default, string $extension = ''): ?HtmlString
     {
         $path = static::normalizePath($filename, $extension);
         $contents = static::getFileContents(static::path($path));