diff --git a/devops-service/providers/ec2.rb b/devops-service/providers/ec2.rb
index 1d5e187..7d35a23 100644
--- a/devops-service/providers/ec2.rb
+++ b/devops-service/providers/ec2.rb
@@ -255,7 +255,7 @@ module Provider
     end
 
     def stack_servers(stack)
-      r = list_stack_resources({'StackName' => stack.name}).body['StackResourceSummaries'] #stack_resources(stack)
+      r = cloud_formation.list_stack_resources({'StackName' => stack.name}).body['StackResourceSummaries'] #stack_resources(stack)
       pp r
       s = r.map{|r| pp r; compute.servers.get(r['PhysicalResourceId'])}
       pp s