diff --git a/src/dispatch/function.py b/src/dispatch/function.py
index 71de6500..798af504 100644
--- a/src/dispatch/function.py
+++ b/src/dispatch/function.py
@@ -36,8 +36,10 @@ def decorator(f):
     def method(self, *args, **kwargs):
         if len(args) == 1 and len(kwargs) == 0 and callable(args[0]):
             return f(self, args[0])
+
         def wrapper(func):
             return f(self, func, *args, **kwargs)
+
         return wrapper
 
     return method