diff --git a/.travis.yml b/.travis.yml
index 66211c9fb..3e544b665 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -33,7 +33,7 @@ matrix:
     env: COMPILER=clang++-3.8
     addons:
       apt:
-        packages: ['clang-3.8']
+        packages: ['g++-6', 'clang-3.8']
 
 ################
 # build script #