diff --git a/cluster/common.sh b/cluster/common.sh
index 189f0f874c..95e286e89d 100755
--- a/cluster/common.sh
+++ b/cluster/common.sh
@@ -671,6 +671,7 @@ ADVANCED_AUDIT_WEBHOOK_THROTTLE_QPS: $(yaml-quote ${ADVANCED_AUDIT_WEBHOOK_THROT
 ADVANCED_AUDIT_WEBHOOK_THROTTLE_BURST: $(yaml-quote ${ADVANCED_AUDIT_WEBHOOK_THROTTLE_BURST:-})
 ADVANCED_AUDIT_WEBHOOK_INITIAL_BACKOFF: $(yaml-quote ${ADVANCED_AUDIT_WEBHOOK_INITIAL_BACKOFF:-})
 GCE_API_ENDPOINT: $(yaml-quote ${GCE_API_ENDPOINT:-})
+GCE_GLBC_IMAGE: $(yaml-quote ${GCE_GLBC_IMAGE:-})
 PROMETHEUS_TO_SD_ENDPOINT: $(yaml-quote ${PROMETHEUS_TO_SD_ENDPOINT:-})
 PROMETHEUS_TO_SD_PREFIX: $(yaml-quote ${PROMETHEUS_TO_SD_PREFIX:-})
 ENABLE_PROMETHEUS_TO_SD: $(yaml-quote ${ENABLE_PROMETHEUS_TO_SD:-false})