diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index e3b825f0781037e1b48a9969eff345814b45661e..9d09813ab9caad68ecf1828f1b0db098b617ed32 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -80,7 +80,7 @@ check-license-header:
     image: $CI_REGISTRY_IMAGE/dev-real:$CI_COMMIT_REF_SLUG
     script:
         - >
-            ! grep \
+            grep \
                 --recursive \
                 --exclude-dir='.git' \
                 --exclude='*.json' \