diff --git a/cluster/gce/gci/configure-helper.sh b/cluster/gce/gci/configure-helper.sh
index 0f145b16b75..2b5b22f450c 100644
--- a/cluster/gce/gci/configure-helper.sh
+++ b/cluster/gce/gci/configure-helper.sh
@@ -2035,7 +2035,7 @@ function start-cluster-autoscaler {
     local -r src_file="${KUBE_HOME}/kube-manifests/kubernetes/gci-trusty/cluster-autoscaler.manifest"
 
     local params
-    params="${AUTOSCALER_MIG_CONFIG}" "${CLOUD_CONFIG_OPT}" "${AUTOSCALER_EXPANDER_CONFIG:---expander=price}"
+    params="${AUTOSCALER_MIG_CONFIG} ${CLOUD_CONFIG_OPT} ${AUTOSCALER_EXPANDER_CONFIG:---expander=price}"
     params+=" --kubeconfig=/etc/srv/kubernetes/cluster-autoscaler/kubeconfig"
 
     # split the params into separate arguments passed to binary