diff --git a/.travis.yml b/.travis.yml
index 03c450b..ef3c1bc 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -89,6 +89,18 @@ matrix:
           sources:
             - ubuntu-toolchain-r-test
 
+    - os: linux
+      compiler: clang++-3.5
+      env: TOOLSET=clang COMPILER=clang++-3.5 CXXSTD=c++14
+      addons:
+        apt:
+          packages:
+            - clang-3.5
+            - libstdc++-4.9-dev
+          sources:
+            - ubuntu-toolchain-r-test
+            - llvm-toolchain-precise-3.5
+
     - os: linux
       compiler: clang++-3.6
       env: TOOLSET=clang COMPILER=clang++-3.6 CXXSTD=c++14
@@ -163,6 +175,7 @@ matrix:
         apt:
           packages:
             - clang-4.0
+            - libstdc++-4.9-dev
           sources:
             - ubuntu-toolchain-r-test
             - llvm-toolchain-trusty-4.0
@@ -175,6 +188,7 @@ matrix:
         apt:
           packages:
             - clang-4.0
+            - libstdc++-4.9-dev
           sources:
             - ubuntu-toolchain-r-test
             - llvm-toolchain-trusty-4.0