diff --git a/Doc/library/warnings.rst b/Doc/library/warnings.rst
index d031b15..076d357 100644
--- a/Doc/library/warnings.rst
+++ b/Doc/library/warnings.rst
@@ -196,8 +196,11 @@
 
    *module_globals*, if supplied, should be the global namespace in use by the code
    for which the warning is issued.  (This argument is used to support displaying
-   source for modules found in zipfiles or other non-filesystem import sources, and
-   was added in Python 2.5.)
+   source for modules found in zipfiles or other non-filesystem import
+   sources).
+
+   .. versionchanged:: 2.5
+      Added the `module_globals` parameter.
 
 
 .. function:: warnpy3k(message[, category[, stacklevel]])