diff --git a/.travis.yml b/.travis.yml
index 524f1fb..3c64230 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -12,6 +12,7 @@ matrix:
           packages:
             - clang-3.6
             - cmake
+            - g++-5
           sources: &sources
             - ubuntu-toolchain-r-test
             - llvm-toolchain-precise-3.6