diff --git a/.travis.yml b/.travis.yml
index f1d4132..b692edb 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -307,7 +307,7 @@ matrix:
       env: CMAKE_INSTALL=1
       script:
         - mkdir __build__ && cd __build__
-        - cmake -DBOOST_ENABLE_CMAKE=1 -DBoost_DEBUG=1 -DBOOST_INCLUDE_LIBRARIES=assert;config -DCMAKE_INSTALL_PREFIX=~/.local ..
+        - cmake -DBOOST_ENABLE_CMAKE=1 -DBoost_DEBUG=1 -DBOOST_INCLUDE_LIBRARIES="assert;config" -DCMAKE_INSTALL_PREFIX=~/.local ..
         - cmake --build . --target install
         - cd ../libs/assert/test/cmake_install_test && mkdir __build__ && cd __build__
         - cmake -DCMAKE_INSTALL_PREFIX=~/.local ..