diff --git a/Doc/lib/libthreading.tex b/Doc/lib/libthreading.tex
index d3a7322..f6d7e4d 100644
--- a/Doc/lib/libthreading.tex
+++ b/Doc/lib/libthreading.tex
@@ -95,6 +95,7 @@
 from the \module{threading} module.  The \var{func} will be passed to 
 \function{sys.settrace()} for each thread, before its \method{run()}
 method is called.
+\versionadded{2.3}
 \end{funcdesc}
 
 \begin{funcdesc}{setprofile}{func}
@@ -102,6 +103,7 @@
 from the \module{threading} module.  The \var{func} will be passed to 
 \function{sys.setprofile()} for each thread, before its \method{run()}
 method is called.
+\versionadded{2.3}
 \end{funcdesc}
 
 Detailed interfaces for the objects are documented below.