diff --git a/.travis.yml b/.travis.yml
index 739195f6e..b6c749764 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -17,6 +17,7 @@ addons:
       - libgmp3-dev
       - libsuitesparse-dev
       - libeigen3-dev
+      - bc
 
 before_script:
     - export CXX="g++-4.8" CC="gcc-4.8" FC="gfortran-4.8"