Add versionadded tags
diff --git a/Doc/library/inspect.rst b/Doc/library/inspect.rst
index 58337f0..92c3ef9 100644
--- a/Doc/library/inspect.rst
+++ b/Doc/library/inspect.rst
@@ -279,10 +279,14 @@
 
    Return true if the object is a Python generator function.
 
+   .. versionadded:: 2.6
+
 .. function:: isgenerator(object)
 
    Return true if the object is a generator.
 
+   .. versionadded:: 2.6
+
 .. function:: istraceback(object)
 
    Return true if the object is a traceback.