diff --git a/novaclient/api_versions.py b/novaclient/api_versions.py
index 63bc789..0005b96 100644
--- a/novaclient/api_versions.py
+++ b/novaclient/api_versions.py
@@ -425,16 +425,17 @@ def _warn_missing_microversion_header(header_name):


 def deprecated_in(version):
+    decorator = wraps('2.0', version)
     def wrapper(fn):
-        @wraps('2.0', version)
         @functools.wraps(fn)
         def wrapped(*a, **k):
+            decorated = decorator(fn)
             if hasattr(fn, '__class__'):
                 mod = fn.__class__.__module__
             else:
                 mod = fn.__module__
             warnings.warn('The %s module is deprecated '
                           'and will be removed.' % mod, DeprecationWarning)
-            return fn(*a, **k)
+            return decorated(*a, **k)
         return wrapped
     return wrapper