diff --git a/tmpl/tex/en_technical/header.tex.tmpl b/tmpl/tex/en_technical/header.tex.tmpl
index c1c3dc5f..06cd855c 100644
--- a/tmpl/tex/en_technical/header.tex.tmpl
+++ b/tmpl/tex/en_technical/header.tex.tmpl
@@ -114,6 +114,7 @@
 \newcommand {\sigy}{}
 \newcommand {\sigx}{}
 \newcommand {\xnull}{}
+\newcommand {\dspider}{{\bf Dspider}\textsuperscript{\textregistered}\,}
 
 % \DeclareMathSymbol{\C}{\mathalpha}{\AMSb}{``43}
 % \DeclareMathSymbol{\R}{\mathalpha}{\AMSb}{``52}
@@ -125,4 +126,3 @@
 \renewcommand\textfraction{.1}
 
 \newenvironment{prog}{\begin{quote}}{\end{quote} }
-