diff --git a/Modular_arithmetic/doc_tex/Modular_arithmetic/main.tex b/Modular_arithmetic/doc_tex/Modular_arithmetic/main.tex
index a88f0575aa6..bb7e7cfab2d 100644
--- a/Modular_arithmetic/doc_tex/Modular_arithmetic/main.tex
+++ b/Modular_arithmetic/doc_tex/Modular_arithmetic/main.tex
@@ -68,4 +68,4 @@ The class \ccc{CGAL::Residue} is based on the C-code of Sylvain Pion et. al.
 as it was presented in \cite{bepp-sdrns-99}. 
 
 The remaining part of the package is the result of the integration process
-of the NumeriX library of EXACUS \cite{beh+-eeeafcs-05} into CGAL.
\ No newline at end of file
+of the NumeriX library of \exacus\ \cite{beh+-eeeafcs-05} into CGAL.
\ No newline at end of file