diff --git a/lib/LaTeXML/Engine/TeX_Math.pool.ltxml b/lib/LaTeXML/Engine/TeX_Math.pool.ltxml
index eeb255442..e258aaf25 100644
--- a/lib/LaTeXML/Engine/TeX_Math.pool.ltxml
+++ b/lib/LaTeXML/Engine/TeX_Math.pool.ltxml
@@ -1106,7 +1106,6 @@ DefRegister('\belowdisplayshortskip' => Glue('0pt plus 3pt'));
 
 DefRegister('\binoppenalty'        => Number(700));
 DefRegister('\relpenalty'          => Number(500));
-DefRegister('\relpenalty'          => Number(700));
 DefRegister('\displaywidowpenalty' => Number(50));
 DefRegister('\predisplaypenalty'   => Number(10000));
 DefRegister('\postdisplaypenalty'  => Number(0));