footnote about keyword args
diff --git a/Doc/ref/ref7.tex b/Doc/ref/ref7.tex
index 196215a..89fa6ed 100644
--- a/Doc/ref/ref7.tex
+++ b/Doc/ref/ref7.tex
@@ -267,7 +267,9 @@
\indexii{function}{definition}
A function definition defines a user-defined function object (see
-section \ref{types}):
+section \ref{types}):\footnote{The new syntax to receive arbitrary
+keyword arguments is not yet documented in this manual. See chapter
+12 of the Tutorial.}
\obindex{user-defined function}
\obindex{function}