diff --git a/mmacells.sty b/mmacells.sty
index 07cd441..ce09ed2 100644
--- a/mmacells.sty
+++ b/mmacells.sty
@@ -825,6 +825,12 @@
   morekeywords={_},
   keywordsprefix=_, % Blank... patterns with head
 }[keywords,comments,strings,fancyvrb]
+
+% Use newly defined Mathematica language to make sure everything is properly
+% initialized. \lstset sets options only inside current group,
+% delimited by braces, so this has no effect besides initialization.
+{\lstset{language=[base]Mathematica}}
+
 \lstdefinestyle{MathematicaFrontEnd}{
   showstringspaces=false,
   columns=fullflexible,