diff --git a/sat/memory/memory.py b/sat/memory/memory.py
index 111611fb..388355dd 100644
--- a/sat/memory/memory.py
+++ b/sat/memory/memory.py
@@ -1568,6 +1568,7 @@ class Memory(object):
         @param path(unicode, None): virtual path of the file in the namespace
             if set, parent must be None. All intermediate directories will be created
             if needed, using current access.
+        @param type_(str, None): type of file filter, can be one of C.FILE_TYPE_*
         @param file_hash(unicode): unique hash of the payload
         @param hash_algo(unicode): algorithm used for hashing the file (usually sha-256)
         @param size(int): size in bytes
@@ -1623,7 +1624,7 @@ class Memory(object):
         if namespace is not None:
             namespace = namespace.strip() or None
         if type_ == C.FILE_TYPE_DIRECTORY:
-            if any(version, file_hash, size, mime_type):
+            if any((version, file_hash, size, mime_type)):
                 raise ValueError(
                     "version, file_hash, size and mime_type can't be set for a directory"
                 )