diff --git a/toolz/functoolz.py b/toolz/functoolz.py
index 408d73f3..238d1b16 100644
--- a/toolz/functoolz.py
+++ b/toolz/functoolz.py
@@ -498,7 +498,7 @@ def composed_doc(*fs):
     def __name__(self):
         try:
             return '_of_'.join(
-                f.__name__ for f in reversed((self.first,) + self.funcs)
+                (f.__name__ for f in reversed((self.first,) + self.funcs))
             )
         except AttributeError:
             return type(self).__name__