diff --git a/lib/ansible/modules/cloud/amazon/elb_target_group.py b/lib/ansible/modules/cloud/amazon/elb_target_group.py
index be6ee23098f..1203ec6074f 100644
--- a/lib/ansible/modules/cloud/amazon/elb_target_group.py
+++ b/lib/ansible/modules/cloud/amazon/elb_target_group.py
@@ -459,7 +459,7 @@ def create_or_update_target_group(connection, module):
                     instances_to_add = []
                     for target in params['Targets']:
                         if target['Id'] in add_instances:
-                            instances_to_add.append(target)
+                            instances_to_add.append({'Id': target['Id'], 'Port': int(target['Port'])})
 
                     changed = True
                     try: