diff --git a/website/docs/r/rds_cluster_endpoint.html.markdown b/website/docs/r/rds_cluster_endpoint.html.markdown
index 93341770551..742052046cf 100644
--- a/website/docs/r/rds_cluster_endpoint.html.markdown
+++ b/website/docs/r/rds_cluster_endpoint.html.markdown
@@ -30,6 +30,8 @@ resource "aws_rds_cluster_instance" "test1" {
   cluster_identifier = "${aws_rds_cluster.default.id}"
   identifier         = "test1"
   instance_class     = "db.t2.small"
+  engine             = "${aws_rds_cluster.default.engine}"
+  engine_version     = "${aws_rds_cluster.default.engine_version}"
 }
 
 resource "aws_rds_cluster_instance" "test2" {
@@ -37,6 +39,8 @@ resource "aws_rds_cluster_instance" "test2" {
   cluster_identifier = "${aws_rds_cluster.default.id}"
   identifier         = "test2"
   instance_class     = "db.t2.small"
+  engine             = "${aws_rds_cluster.default.engine}"
+  engine_version     = "${aws_rds_cluster.default.engine_version}"
 }
 
 resource "aws_rds_cluster_instance" "test3" {
@@ -44,6 +48,8 @@ resource "aws_rds_cluster_instance" "test3" {
   cluster_identifier = "${aws_rds_cluster.default.id}"
   identifier         = "test3"
   instance_class     = "db.t2.small"
+  engine             = "${aws_rds_cluster.default.engine}"
+  engine_version     = "${aws_rds_cluster.default.engine_version}"
 }
 
 resource "aws_rds_cluster_endpoint" "eligible" {
diff --git a/website/docs/r/rds_cluster_instance.html.markdown b/website/docs/r/rds_cluster_instance.html.markdown
index 125b24498bb..0c530918701 100644
--- a/website/docs/r/rds_cluster_instance.html.markdown
+++ b/website/docs/r/rds_cluster_instance.html.markdown
@@ -31,6 +31,8 @@ resource "aws_rds_cluster_instance" "cluster_instances" {
   identifier         = "aurora-cluster-demo-${count.index}"
   cluster_identifier = "${aws_rds_cluster.default.id}"
   instance_class     = "db.r4.large"
+  engine             = "${aws_rds_cluster.default.engine}"
+  engine_version     = "${aws_rds_cluster.default.engine_version}"
 }
 
 resource "aws_rds_cluster" "default" {