X-Git-Url: https://git.arvados.org/arvados.git/blobdiff_plain/4dac499d30988fd8289a40ad4128d6d471037180..eb66b34d22cef6c98ad9ebdc228cf784b3136b72:/sdk/cwl/arvados_cwl/fsaccess.py

diff --git a/sdk/cwl/arvados_cwl/fsaccess.py b/sdk/cwl/arvados_cwl/fsaccess.py
index 7736cab4d8..93e2819084 100644
--- a/sdk/cwl/arvados_cwl/fsaccess.py
+++ b/sdk/cwl/arvados_cwl/fsaccess.py
@@ -1,3 +1,7 @@
+# Copyright (C) The Arvados Authors. All rights reserved.
+#
+# SPDX-License-Identifier: Apache-2.0
+
 import fnmatch
 import os
 import errno
@@ -91,7 +95,7 @@ class CollectionFsAccess(cwltool.stdfsaccess.StdFsAccess):
 
     def exists(self, fn):
         collection, rest = self.get_collection(fn)
-        if collection:
+        if collection is not None:
             if rest:
                 return collection.exists(rest)
             else: