diff --git a/.travis.yml b/.travis.yml
index f7a3095..71f3b87 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -217,6 +217,7 @@ matrix:
         apt:
           packages:
             - clang-3.8
+            - libstdc++-4.9-dev
           sources:
             - ubuntu-toolchain-r-test
             - llvm-toolchain-precise-3.8
@@ -227,6 +228,7 @@ matrix:
         apt:
           packages:
             - clang-3.8
+            - libstdc++-4.9-dev
           sources:
             - ubuntu-toolchain-r-test
             - llvm-toolchain-precise-3.8