diff --git a/doc/misc/gnus.texi b/doc/misc/gnus.texi
index c34dd7caf08..393787c33a3 100644
--- a/doc/misc/gnus.texi
+++ b/doc/misc/gnus.texi
@@ -14656,7 +14656,7 @@ an additional mail source for a particular group by including the
 @code{group} mail specifier in @code{mail-sources}, and setting a
 @code{mail-source} group parameter (@pxref{Group Parameters}) specifying
 a single mail source.  When this is used, @code{mail-sources} is
-typically just @code{(group)}; the @code{mail-source} parameter for a
+typically just @code{((group))}; the @code{mail-source} parameter for a
 group might look like this:
 
 @lisp