diff --git a/cloud/amazon/ec2_vpc_subnet.py b/cloud/amazon/ec2_vpc_subnet.py
index 64b1df387d3..46f78362a28 100644
--- a/cloud/amazon/ec2_vpc_subnet.py
+++ b/cloud/amazon/ec2_vpc_subnet.py
@@ -164,7 +164,7 @@ def ensure_tags(vpc_conn, resource_id, tags, add_only, check_mode):
         if to_delete and not add_only:
             vpc_conn.delete_tags(resource_id, to_delete, dry_run=check_mode)
 
-        to_add = dict((k, tags[k]) for k in tags if k not in cur_tags)
+        to_add = dict((k, tags[k]) for k in tags if k not in cur_tags or cur_tags[k] != tags[k])
         if to_add:
             vpc_conn.create_tags(resource_id, to_add, dry_run=check_mode)