diff --git a/Doc/lib/libregex.tex b/Doc/lib/libregex.tex
index 2f8fbd85c64..dd82ff425b4 100644
--- a/Doc/lib/libregex.tex
+++ b/Doc/lib/libregex.tex
@@ -305,7 +305,7 @@ result is a tuple with one item per argument.  If the \var{index} is
 zero, the corresponding return value is the entire matching string; if
 it is in the inclusive range [1..99], it is the string matching the
 the corresponding parenthesized group (using the default syntax,
-groups are parenthesized using \code{\\(} and \code{\\)}).  If no
+groups are parenthesized using \code{{\e}(} and \code{{\e})}).  If no
 such group exists, the corresponding result is \code{None}.
 
 If the regular expression was compiled by \code{symcomp} instead of
diff --git a/Doc/libregex.tex b/Doc/libregex.tex
index 2f8fbd85c64..dd82ff425b4 100644
--- a/Doc/libregex.tex
+++ b/Doc/libregex.tex
@@ -305,7 +305,7 @@ result is a tuple with one item per argument.  If the \var{index} is
 zero, the corresponding return value is the entire matching string; if
 it is in the inclusive range [1..99], it is the string matching the
 the corresponding parenthesized group (using the default syntax,
-groups are parenthesized using \code{\\(} and \code{\\)}).  If no
+groups are parenthesized using \code{{\e}(} and \code{{\e})}).  If no
 such group exists, the corresponding result is \code{None}.
 
 If the regular expression was compiled by \code{symcomp} instead of