diff --git a/ci/build.windows.gitlab-ci.yml b/ci/build.windows.gitlab-ci.yml
index 7cd4567e8..ff9c4036e 100644
--- a/ci/build.windows.gitlab-ci.yml
+++ b/ci/build.windows.gitlab-ci.yml
@@ -20,7 +20,7 @@
     - if: $CI_PIPELINE_SOURCE == "merge_request_event" && $CI_PROJECT_NAMESPACE == "libeigen" && $CI_MERGE_REQUEST_LABELS =~ "/all-tests/"
 
   cache:
-    key: "$CI_JOB_NAME-$CI_COMMIT_REF_SLUG-BUILD"
+    key: "$CI_JOB_NAME_SLUG-$CI_COMMIT_REF_SLUG-BUILD"
     paths:
       - ${EIGEN_CI_BUILDDIR}/