Fix versionadded for py3k math.gamma
diff --git a/Doc/library/math.rst b/Doc/library/math.rst
index 270c25f..db620cf 100644
--- a/Doc/library/math.rst
+++ b/Doc/library/math.rst
@@ -285,7 +285,7 @@
 
    Return the Gamma function at *x*.
 
-   .. versionadded:: 2.7
+   .. versionadded:: 3.2
 
 
 Constants