diff --git a/importhook/__init__.py b/importhook/__init__.py
index b5a5738..83c5dad 100644
--- a/importhook/__init__.py
+++ b/importhook/__init__.py
@@ -68,7 +68,6 @@ def on_import(module_name, func=None):
         importhook.on_import('httplib', on_httplib_import)
     """
     if func is None:
-        @functools.wraps(func)
         def decorator(func):
             registry[module_name] = func
             return func