--- a/src/Illuminate/Filesystem/FilesystemAdapter.php
+++ b/src/Illuminate/Filesystem/FilesystemAdapter.php
@@ -475,7 +475,7 @@
         }

-        $stream = fopen(is_string($file) ? $file : $file->getRealPath(), 'r');
+        $stream = fopen(is_string($file) ? $file : ($file->getRealPath() ?: $file->getPathname()), 'r');

         // Next, we will format the path of the file and store the file using a stream since
         // they provide better performance than alternatives. Once we write the file this
         // stream will get closed automatically by us so the developer doesn't have to.