diff -u yacas-1.0.57/debian/control yacas-1.0.57/debian/control
--- yacas-1.0.57/debian/control
+++ yacas-1.0.57/debian/control
@@ -3,7 +3,7 @@
 Priority: extra
 Maintainer: Gopal Narayanan <gopal@debian.org>
 Standards-Version: 3.6.1.1
-Build-Depends: lynx,libfltk1.1-dev,debhelper (>=2.0.86),docbook-to-man, libgsl0-dev, automake, autoconf, freeglut3-dev
+Build-Depends: lynx,libfltk1.1-dev,debhelper (>=2.0.86),docbook-to-man, libgsl0-dev, automake, autoconf, freeglut3-dev, libxmu-dev
 
 Package: yacas
 Architecture: any