diff --git a/cluster/gce/util.sh b/cluster/gce/util.sh
index 77dd2f15a0..701f6b84b3 100755
--- a/cluster/gce/util.sh
+++ b/cluster/gce/util.sh
@@ -647,7 +647,7 @@ function create-nodes() {
   local last_mig_size=$((${NUM_NODES} - (${NUM_MIGS} - 1) * ${instances_per_mig}))
 
   #TODO: parallelize this loop to speed up the process
-  for i in $(seq $((${NUM_MIGS} - 1))); do
+  for ((i=1; i<${NUM_MIGS}; i++)); do
     gcloud compute instance-groups managed \
         create "${NODE_INSTANCE_PREFIX}-group-$i" \
         --project "${PROJECT}" \
@@ -708,7 +708,7 @@ function create-autoscaler() {
     local min_instances_per_mig=$(((${AUTOSCALER_MIN_NODES} + ${NUM_MIGS} - 1) / ${NUM_MIGS}))
     local last_min_instances=$((${AUTOSCALER_MIN_NODES} - (${NUM_MIGS} - 1) * ${min_instances_per_mig}))
 
-    for i in $(seq $((${NUM_MIGS} - 1))); do
+    for ((i=1; i<${NUM_MIGS}; i++)); do
       gcloud compute instance-groups managed set-autoscaling "${NODE_INSTANCE_PREFIX}-group-$i" --zone "${ZONE}" --project "${PROJECT}" \
           --min-num-replicas "${min_instances_per_mig}" --max-num-replicas "${max_instances_per_mig}" ${metrics} || true
     done