diff --git a/uncertainties/core.py b/uncertainties/core.py
index 8c707a9e..8ed7d433 100644
--- a/uncertainties/core.py
+++ b/uncertainties/core.py
@@ -103,7 +103,7 @@ def set_doc_string(func):
 
 def deprecation(message):
     '''
-    Warns the user with the given message, by issuing a
+    Warn the user with the given message, by issuing a
     DeprecationWarning.
     '''