diff --git a/tools/start-ci.sh b/tools/start-ci.sh
index 4b66966812..528c3544b1 100755
--- a/tools/start-ci.sh
+++ b/tools/start-ci.sh
@@ -5,6 +5,7 @@ set -xe
 GITHUB_TOKEN=$1
 OWNER=$2
 REPOSITORY=$3
+API_URL=https://api.github.com
 REQUEST_CI_LABEL='request-ci'
 REQUEST_CI_FAILED_LABEL='request-ci-failed'
 shift 3