diff --git a/etc/refcards/refcard.tex b/etc/refcards/refcard.tex
index afae238c783..c8f07540e5f 100644
--- a/etc/refcards/refcard.tex
+++ b/etc/refcards/refcard.tex
@@ -562,8 +562,8 @@ minibuffer.  Type \kbd{F10} to activate menu bar items on text terminals.
 \key{quote regular expression special character {\it c\/}}{\\{\it c}}
 \key{alternative (``or'')}{\\|}
 \key{grouping}{\\( {\rm$\ldots$} \\)}
-\key{shy grouping}{\\(:? {\rm$\ldots$} \\)}
-\key{explicit numbered grouping}{\\(:NUM {\rm$\ldots$} \\)}
+\key{shy grouping}{\\(?: {\rm$\ldots$} \\)}
+\key{explicit numbered grouping}{\\(?NUM: {\rm$\ldots$} \\)}
 \key{same text as {\it n\/}th group}{\\{\it n}}
 \key{at word break}{\\b}
 \key{not at word break}{\\B}