diff --git a/etc/ru-refcard.tex b/etc/ru-refcard.tex
index 46e2eee50f2..2853c65a115 100644
--- a/etc/ru-refcard.tex
+++ b/etc/ru-refcard.tex
@@ -20,7 +20,7 @@
 \setlength{\ColThreeWidth}{25mm}
 
 \newcommand{\versionnumber}[0]{2.3}
-\newcommand{\versionemacs}[0][22]
+\newcommand{\versionemacs}[0]{22}
 \newcommand{\nyear}[0]{2007}
 
 \newcommand\shortcopyrightnotice[0]{\vskip 1ex plus 2 fill