diff --git a/.travis.yml b/.travis.yml
index 85eb8491..6018b7f1 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -107,7 +107,7 @@ before_install:
   - which $CXX
   - which $CC
   - which valgrind
-  - if [ -n "$CLANG_VERSION" ]; then sudo CXX=$CXX CC=$CC .tests/install_libcxx.sh; fi
+  - if [ -n "$CLANG_VERSION" ]; then sudo CXX=$CXX CC=$CC ./tests/install_libcxx.sh; fi
 
 install:
   - cd $CHECKOUT_PATH