diff --git a/Doc/lib/libre.tex b/Doc/lib/libre.tex
index f9f4871..208f8d1 100644
--- a/Doc/lib/libre.tex
+++ b/Doc/lib/libre.tex
@@ -578,10 +578,10 @@
 \end{datadesc}
 
 \begin{seealso}
-\seetext Jeffrey Friedl, \emph{Mastering Regular Expressions},
+\seetext{Jeffrey Friedl, \emph{Mastering Regular Expressions},
 O'Reilly.  The Python material in this book dates from before the re
 module, but it covers writing good regular expression patterns in
-great detail. 
+great detail.}
 \end{seealso}
 
 
diff --git a/Doc/libre.tex b/Doc/libre.tex
index f9f4871..208f8d1 100644
--- a/Doc/libre.tex
+++ b/Doc/libre.tex
@@ -578,10 +578,10 @@
 \end{datadesc}
 
 \begin{seealso}
-\seetext Jeffrey Friedl, \emph{Mastering Regular Expressions},
+\seetext{Jeffrey Friedl, \emph{Mastering Regular Expressions},
 O'Reilly.  The Python material in this book dates from before the re
 module, but it covers writing good regular expression patterns in
-great detail. 
+great detail.}
 \end{seealso}