diff --git a/Doc/library/math.rst b/Doc/library/math.rst
index 566603d..270c25f 100644
--- a/Doc/library/math.rst
+++ b/Doc/library/math.rst
@@ -278,6 +278,16 @@
    Return the hyperbolic tangent of *x*.
 
 
+Special functions
+-----------------
+
+.. function:: gamma(x)
+
+   Return the Gamma function at *x*.
+
+   .. versionadded:: 2.7
+
+
 Constants
 ---------