diff --git a/doc/latex/decls.tex b/doc/latex/decls.tex
index c0e16a5..ed322b3 100644
--- a/doc/latex/decls.tex
+++ b/doc/latex/decls.tex
@@ -222,6 +222,12 @@
   {\index{#1}
    \hbox to \linewidth{\ttchars{{\ttt{#1}} \hfill #2}}}%
 
+\newcommand{\defsyn}{\par\medskip\defsynx} % Takes 2 arguments, actually.
+\newcommand{\defsynx}[2]%
+  {\index{#1}
+   \hbox to \linewidth{\ttchars{{(#1 \ttt{#2})} \hfill syntax}}}%
+
+
 % Typeset the protocol line, then do the following descriptive text indented.
 % If you want to group two procs together, do the first one with a \dfn, 
 % then the second one, and the documentation, with a \defndescx.