diff --git a/Doc/lib/libmpz.tex b/Doc/lib/libmpz.tex
index 2771d9201f4..7ab5fe79384 100644
--- a/Doc/lib/libmpz.tex
+++ b/Doc/lib/libmpz.tex
@@ -16,8 +16,8 @@ In general, \dfn{mpz}-numbers can be used just like other standard
 Python numbers, e.g.\ you can use the built-in operators like \code{+},
 \code{*}, etc., as well as the standard built-in functions like
 \code{abs}, \code{int}, \ldots, \code{divmod}, \code{pow}.
-\strong{Please note:} the {\it bitwise-xor} operation has been implemented as
-a bunch of {\it and}s, {\it invert}s and {\it or}s, because the library
+\strong{Please note:} the \emph{bitwise-xor} operation has been implemented as
+a bunch of \emph{and}s, \emph{invert}s and \emph{or}s, because the library
 lacks an \code{mpz_xor} function, and I didn't need one.
 
 You create an mpz-number by calling the function called \code{mpz} (see
diff --git a/Doc/libmpz.tex b/Doc/libmpz.tex
index 2771d9201f4..7ab5fe79384 100644
--- a/Doc/libmpz.tex
+++ b/Doc/libmpz.tex
@@ -16,8 +16,8 @@ In general, \dfn{mpz}-numbers can be used just like other standard
 Python numbers, e.g.\ you can use the built-in operators like \code{+},
 \code{*}, etc., as well as the standard built-in functions like
 \code{abs}, \code{int}, \ldots, \code{divmod}, \code{pow}.
-\strong{Please note:} the {\it bitwise-xor} operation has been implemented as
-a bunch of {\it and}s, {\it invert}s and {\it or}s, because the library
+\strong{Please note:} the \emph{bitwise-xor} operation has been implemented as
+a bunch of \emph{and}s, \emph{invert}s and \emph{or}s, because the library
 lacks an \code{mpz_xor} function, and I didn't need one.
 
 You create an mpz-number by calling the function called \code{mpz} (see