diff --git a/.travis.yml b/.travis.yml
index b58abd2976..0c4b2ef779 100755
--- a/.travis.yml
+++ b/.travis.yml
@@ -66,7 +66,7 @@ jobs:
         env:
           - CC=clang-10
           - CXX=clang++-10
-          - CMAKE_ARGS="-DPYTHON_EXECUTABLE=/usr/bin/python3 -DBUILD_FEM_NETGEN=ON -DBUILD_QT5=ON -DBUILD_ENABLE_CXX_STD='C++17'"
+          - CMAKE_ARGS="-DPYTHON_EXECUTABLE=/usr/bin/python3 -DBUILD_FEM_NETGEN=ON -DBUILD_QT5=ON -DCMAKE_CXX_FLAGS='-Wno-c++17-extensions'"
           - CACHE_NAME=JOB1
 
       - os: linux