a test
diff --git a/.travis.yml b/.travis.yml
index b204d37..344aa21 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -151,7 +151,7 @@
(cd ${LLVM_DIR}/build/projects/libcxx && make install -j2)
(cd ${LLVM_DIR}/build/projects/libcxxabi && make install -j2)
fi
- export CXXFLAGS="-nostdinc++ -isystem ${LLVM_DIR}/install/include/c++/v1"
+ export CXXFLAGS="-stdlib=libc++ -nostdinc++ -isystem ${LLVM_DIR}/install/include/c++/v1"
export LDFLAGS="-L ${LLVM_DIR}/install/lib -l c++ -l c++abi"
export LD_LIBRARY_PATH="${LD_LIBRARY_PATH}:${LLVM_DIR}/install/lib"
export PATH="${LLVM_DIR}/clang/bin:${PATH}"