diff --git a/Doc/lib/libfuncs.tex b/Doc/lib/libfuncs.tex
index ea48539..85ead28 100644
--- a/Doc/lib/libfuncs.tex
+++ b/Doc/lib/libfuncs.tex
@@ -75,6 +75,9 @@
   to \code{\var{function}(*\var{args}, **\var{keywords})}.
   Use of \function{apply()} is not necessary since the ``extended call
   syntax,'' as used in the last example, is completely equivalent.
+
+  \deprecated{2.3}{Use the extended call syntax instead, as described
+                   above.}
 \end{funcdesc}
 
 \begin{funcdesc}{bool}{x}