diff --git a/main.tf b/main.tf
index fd1a74952..85ba280d5 100644
--- a/main.tf
+++ b/main.tf
@@ -66,6 +66,7 @@ resource "aws_default_security_group" "this" {
       cidr_blocks      = compact(split(",", lookup(ingress.value, "cidr_blocks", "")))
       ipv6_cidr_blocks = compact(split(",", lookup(ingress.value, "ipv6_cidr_blocks", "")))
       prefix_list_ids  = compact(split(",", lookup(ingress.value, "prefix_list_ids", "")))
+      security_groups  = compact(split(",", lookup(ingress.value, "security_groups", "")))
       description      = lookup(ingress.value, "description", null)
       from_port        = lookup(ingress.value, "from_port", 0)
       to_port          = lookup(ingress.value, "to_port", 0)
@@ -80,6 +81,7 @@ resource "aws_default_security_group" "this" {
       cidr_blocks      = compact(split(",", lookup(egress.value, "cidr_blocks", "")))
       ipv6_cidr_blocks = compact(split(",", lookup(egress.value, "ipv6_cidr_blocks", "")))
       prefix_list_ids  = compact(split(",", lookup(egress.value, "prefix_list_ids", "")))
+      security_groups  = compact(split(",", lookup(egress.value, "security_groups", "")))
       description      = lookup(egress.value, "description", null)
       from_port        = lookup(egress.value, "from_port", 0)
       to_port          = lookup(egress.value, "to_port", 0)