diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 1284341..be43e51 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -558,6 +558,7 @@
     EXTRA_OPTION: >
       -D osmesa=classic
       -D tools=all
+      -D werror=true
 
 .meson-cross:
   extends: