diff --git a/doc/sbase/dist/birddoc/latex2e/mapping b/doc/sbase/dist/birddoc/latex2e/mapping
index 45c65d62..9d662be2 100644
--- a/doc/sbase/dist/birddoc/latex2e/mapping
+++ b/doc/sbase/dist/birddoc/latex2e/mapping
@@ -208,11 +208,11 @@
 <funcdef>		"{\\it "
 </funcdef>		"\\/}"
 
-<function>		"\\bigbreak\\hrule\\nobreak\\bigskip\\nobreak\\leftline{\\bf Function}\\nobreak\\smallskip\\nobreak{\\parskip=0pt "
+<function>		"{\\function "
 </function>		"}\n\n"
 
-<funcsect>		"\n\\medbreak\\leftline{\\bf "
-</funcsect>		"}\\nobreak "
+<funcsect>		"\n\\funcsect{"
+</funcsect>		"}"
 
 <hrule>			"\\hrule"
 
diff --git a/doc/tex/birddoc.sty b/doc/tex/birddoc.sty
index 3cb74035..94297591 100644
--- a/doc/tex/birddoc.sty
+++ b/doc/tex/birddoc.sty
@@ -111,3 +111,8 @@
 \newenvironment{tscreen}%
  {\begin{quote}\bgroup\small\tt}%
  {\egroup\end{quote}}
+
+%% Typesetting of function descriptions
+
+\def\function{\bigbreak\hrule\nobreak\bigskip\nobreak\leftline{\bf Function}\nobreak\smallskip\nobreak\parskip=0pt\relax}
+\def\funcsect#1{\medbreak\leftline{\bf #1}\nobreak}