diff --git a/google/resource_dataproc_cluster.go b/google/resource_dataproc_cluster.go
index c29cf060..16374639 100644
--- a/google/resource_dataproc_cluster.go
+++ b/google/resource_dataproc_cluster.go
@@ -801,9 +801,7 @@ func flattenPreemptibleInstanceGroupConfig(d *schema.ResourceData, icg *dataproc
 
 func flattenInstanceGroupConfig(d *schema.ResourceData, icg *dataproc.InstanceGroupConfig) []map[string]interface{} {
 	disk := map[string]interface{}{}
-	data := map[string]interface{}{
-	//"instance_names": []string{},
-	}
+	data := map[string]interface{}{}
 
 	if icg != nil {
 		data["num_instances"] = icg.NumInstances