diff --git a/local.tf b/local.tf
index ef71665..999a987 100644
--- a/local.tf
+++ b/local.tf
@@ -4,8 +4,7 @@ locals {
   # Followed recommendation http://67bricks.com/blog/?p=85
   # to workaround terraform not supporting short circut evaluation
   cluster_security_group_id = "${coalesce(join("", aws_security_group.cluster.*.id), var.cluster_security_group_id)}"
-
-  worker_security_group_id  = "${coalesce(join("", aws_security_group.workers.*.id), var.cluster_security_group_id)}"
+  worker_security_group_id  = "${coalesce(join("", aws_security_group.workers.*.id), var.worker_security_group_id)}"
   workstation_external_cidr = "${chomp(data.http.workstation_external_ip.body)}/32"
 
   # Mapping from the node type that we selected and the max number of pods that it can run