diff --git a/Modular_arithmetic/doc_tex/Modular_arithmetic/main.tex b/Modular_arithmetic/doc_tex/Modular_arithmetic/main.tex
index 23b4fda409f..95a99ddfb5f 100644
--- a/Modular_arithmetic/doc_tex/Modular_arithmetic/main.tex
+++ b/Modular_arithmetic/doc_tex/Modular_arithmetic/main.tex
@@ -39,5 +39,5 @@ 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 libray of EXACUS \cite{beh+-eeeafcs-05} into CGAL. 
+of the NumeriX Libra of EXACUS \cite{beh+-eeeafcs-05} into CGAL.