diff --git a/.travis.yml b/.travis.yml
index ca8751b5..629c29c6 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -31,13 +31,13 @@ before_script:
   - pip install --user git+git://github.com/eddyxu/cpp-coveralls.git
 
 script:
-  - make CXX=$COMPILER
+  - make CXX=$COMPILER CXXFLAGS="-lstdc++"
   - ./json_unit "*"
   - valgrind --error-exitcode=1 --leak-check=full ./json_unit
 
 after_success:
   - make clean
   - touch src/json.hpp
-  - make json_unit CXXFLAGS="-fprofile-arcs -ftest-coverage -std=c++11" CXX=$COMPILER
+  - make json_unit CXXFLAGS="-fprofile-arcs -ftest-coverage -std=c++11 -lstdc++" CXX=$COMPILER
   - ./json_unit "*"
   - coveralls --exclude test/catch.hpp --exclude test/unit.cpp --include src/json.hpp --gcov-options '\-lp' --gcov 'gcov-4.9'