diff --git a/cluster/gke/util.sh b/cluster/gke/util.sh
index 0fb3cef8cd9..e0f57f49c25 100755
--- a/cluster/gke/util.sh
+++ b/cluster/gke/util.sh
@@ -296,8 +296,10 @@ function detect-node-names {
 
 # Detect instance group name generated by gke.
 #
-# Note that this will only select instance groups in the same zone as the
-# cluster, meaning that it won't include all groups in a multi-zone cluster.
+# Note that the NODE_INSTANCE_GROUPS var will only have instance groups in the
+# same zone as the cluster, meaning that it won't include all groups in a
+# multi-zone cluster. The ALL_INSTANCE_GROUP_URLS will contain all the
+# instance group URLs, which include multi-zone groups.
 #
 # Assumed vars:
 #   GCLOUD
@@ -306,15 +308,20 @@ function detect-node-names {
 #   CLUSTER_NAME
 # Vars set:
 #   NODE_INSTANCE_GROUPS
+#   ALL_INSTANCE_GROUP_URLS
 function detect-node-instance-groups {
   echo "... in gke:detect-node-instance-groups()" >&2
   local urls=$("${GCLOUD}" ${CMD_GROUP:-} container clusters describe \
     --project="${PROJECT}" --zone="${ZONE}" \
     --format='value(instanceGroupUrls)' "${CLUSTER_NAME}")
   urls=(${urls//;/ })
+  ALL_INSTANCE_GROUP_URLS=${urls[*]}
   NODE_INSTANCE_GROUPS=()
   for url in "${urls[@]:-}"; do
-    NODE_INSTANCE_GROUPS+=("${url##*/}")
+    local igm_zone=$(expr match ${url} '.*/zones/\([a-z0-9-]*\)/')
+    if [[ "${igm_zone}" == "${ZONE}" ]]; then
+      NODE_INSTANCE_GROUPS+=("${url##*/}")
+    fi
   done
 }