diff --git a/website/source/docs/providers/aws/r/ecs_service.html.markdown b/website/source/docs/providers/aws/r/ecs_service.html.markdown
index c141b219a..8e8c9716f 100644
--- a/website/source/docs/providers/aws/r/ecs_service.html.markdown
+++ b/website/source/docs/providers/aws/r/ecs_service.html.markdown
@@ -27,7 +27,7 @@ resource "aws_ecs_service" "mongo" {
 
   placement_strategy {
     type  = "binpack"
-    field = "CPU"
+    field = "cpu"
   }
 
   load_balancer {