diff --git a/.gitlab-ci/fluster/fluster-runner.sh b/.gitlab-ci/fluster/fluster-runner.sh
index 022dc7caf31..91887fbbfc6 100755
--- a/.gitlab-ci/fluster/fluster-runner.sh
+++ b/.gitlab-ci/fluster/fluster-runner.sh
@@ -16,7 +16,7 @@ fi
 # Check which fluster vectors to get
 FLUSTER_VECTORS_HOST_PATH="${STORAGE_MAINLINE_HOST_PATH}/fluster/${FLUSTER_VECTORS_VERSION}"
 if [ "$CI_PROJECT_PATH" != "$FDO_UPSTREAM_REPO" ]; then
-  if ! curl -s -L --retry 4 -f --retry-delay 60 "https://${FLUSTER_VECTORS_HOST_PATH}/done"; then
+  if ! curl -s -L --retry 4 -f --retry-delay 60 "${FDO_HTTP_CACHE_URI:-}https://${FLUSTER_VECTORS_HOST_PATH}/done"; then
     echo "Using Fluster vectors from the fork, cached from mainline is unavailable."
     FLUSTER_VECTORS_HOST_PATH="${STORAGE_FORK_HOST_PATH}/fluster/${FLUSTER_VECTORS_VERSION}"
   else