diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index b1d2fada701ba6d17e8cef9e473dd99a7d95f8fd..566d757dc66ae164bca943f005e5ad4dba6a662a 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -25,7 +25,7 @@ configure-linux:
   script:
     - mkdir -p build
     - cd build
-    - cmake -DCMAKE_BUILD_TYPE=Debug   ..
+    - cmake -DCMAKE_BUILD_TYPE=Debug -DCMAKE_CXX_COMPILER=g++-8  ..
     - echo "configure | ${CI_PROJECT_DIR}"
   stage: configure
   tags: