diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index b17393743747e1e3821974c261c0b6448c34fc7f..6b5c122160d39c812266fa66cef60eb59b4958db 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -5,6 +5,7 @@ buildjob:
   - coq
   script:
   - 'make -j8 TIMED=y 2>&1 | tee build-log.txt'
+  - 'grep Axiom build-log.txt && exit 1'
   - 'cat build-log.txt  | egrep "[a-zA-Z0-9_/-]+ \(user: [0-9]" > build-time.txt'
   only:
   - master