diff --git a/ci-automation/garbage_collect.sh b/ci-automation/garbage_collect.sh
index fdc168ae1f7..437d8ce6bd2 100644
--- a/ci-automation/garbage_collect.sh
+++ b/ci-automation/garbage_collect.sh
@@ -263,6 +263,7 @@ function _garbage_collect_impl() {
       --env BRIGHTBOX_CLIENT_ID --env BRIGHTBOX_CLIENT_SECRET \
       --env AKAMAI_TOKEN \
       --env STACKIT_SERVICE_ACCOUNT \
+      --env STACKIT_PROJECT_ID \
       -w /work -v "$PWD":/work "${mantle_ref}" /work/ci-automation/garbage_collect_cloud.sh
 
     echo
diff --git a/ci-automation/garbage_collect_cloud.sh b/ci-automation/garbage_collect_cloud.sh
index 94c75ca16f5..4561dcfbddf 100755
--- a/ci-automation/garbage_collect_cloud.sh
+++ b/ci-automation/garbage_collect_cloud.sh
@@ -10,7 +10,8 @@ timeout --signal=SIGQUIT 60m ore brightbox gc --duration 6h \
 timeout --signal=SIGQUIT 60m ore akamai gc --duration 6h \
   --akamai-token="${AKAMAI_TOKEN}"
 timeout --signal=SIGQUIT 60m ore stackit gc --duration 6h \
-  --stackit-service-account-key-path=<(echo "${STACKIT_SERVICE_ACCOUNT}" | base64 --decode)
+  --stackit-service-account-key-path=<(echo "${STACKIT_SERVICE_ACCOUNT}" | base64 --decode) \
+  --stackit-project-id="${STACKIT_PROJECT_ID}"
 secret_to_file aws_credentials_config_file "${AWS_CREDENTIALS}"
 for channel in alpha beta stable lts; do
   for arch in amd64 arm64; do