diff --git a/google/resource_compute_instance_group_test.go b/google/resource_compute_instance_group_test.go
index 74f79e98..647b0df2 100644
--- a/google/resource_compute_instance_group_test.go
+++ b/google/resource_compute_instance_group_test.go
@@ -484,7 +484,7 @@ func testAccComputeInstanceGroup_update(instance string) string {
 		description = "Terraform test instance group"
 		name = "%s"
 		zone = "us-central1-c"
-		instances = "${google_compute_instance.ig_instance.*.self_link}"
+		instances = ["${google_compute_instance.ig_instance.*.self_link}"]
 		named_port {
 			name = "http"
 			port = "8080"
@@ -526,7 +526,7 @@ func testAccComputeInstanceGroup_update2(instance string) string {
 		description = "Terraform test instance group"
 		name = "%s"
 		zone = "us-central1-c"
-		instances = "${google_compute_instance.ig_instance.*.self_link}"
+		instances = ["${google_compute_instance.ig_instance.*.self_link}"]
 
 		named_port {
 			name = "http"
@@ -570,7 +570,7 @@ func testAccComputeInstanceGroup_recreateInstances(instance string) string {
 		description = "Terraform test instance group"
 		name = "%s"
 		zone = "us-central1-c"
-		instances = "${google_compute_instance.ig_instance.*.self_link}"
+		instances = ["${google_compute_instance.ig_instance.*.self_link}"]
 		named_port {
 			name = "http"
 			port = "8080"
diff --git a/website/docs/r/compute_router_nat.html.markdown b/website/docs/r/compute_router_nat.html.markdown
index eb5af3b7..6dc57b4d 100644
--- a/website/docs/r/compute_router_nat.html.markdown
+++ b/website/docs/r/compute_router_nat.html.markdown
@@ -83,7 +83,7 @@ resource "google_compute_router_nat" "advanced-nat" {
   router                             = "${google_compute_router.router.name}"
   region                             = "us-central1"
   nat_ip_allocate_option             = "MANUAL_ONLY"
-  nat_ips                            = "${google_compute_address.address.*.self_link}"
+  nat_ips                            = ["${google_compute_address.address.*.self_link}"]
   source_subnetwork_ip_ranges_to_nat = "LIST_OF_SUBNETWORKS"
   subnetwork {
     name = "${google_compute_subnetwork.subnetwork.self_link}"