diff --git a/system/Autoloader/FileLocator.php b/system/Autoloader/FileLocator.php
index 744567a3bcc0..92381a7ee25b 100644
--- a/system/Autoloader/FileLocator.php
+++ b/system/Autoloader/FileLocator.php
@@ -119,6 +119,10 @@ public function locateFile(string $file, ?string $folder = null, string $ext = '
      */
     public function getClassname(string $file): string
     {
+        if (is_dir($file)) {
+            return '';
+        }
+
         $php       = file_get_contents($file);
         $tokens    = token_get_all($php);
         $dlm       = false;
diff --git a/tests/system/Autoloader/FileLocatorTest.php b/tests/system/Autoloader/FileLocatorTest.php
index 1cf32cfa5ad1..8df13094ef7a 100644
--- a/tests/system/Autoloader/FileLocatorTest.php
+++ b/tests/system/Autoloader/FileLocatorTest.php
@@ -312,4 +312,12 @@ public function testGetClassNameFromNonClassFile(): void
             $this->locator->getClassname(SYSTEMPATH . 'bootstrap.php')
         );
     }
+
+    public function testGetClassNameFromDirectory(): void
+    {
+        $this->assertSame(
+            '',
+            $this->locator->getClassname(SYSTEMPATH)
+        );
+    }
 }