diff --git a/builtin/providers/aws/resource_aws_ecs_service.go b/builtin/providers/aws/resource_aws_ecs_service.go
index 842deb4da..ef1ea1846 100644
--- a/builtin/providers/aws/resource_aws_ecs_service.go
+++ b/builtin/providers/aws/resource_aws_ecs_service.go
@@ -357,7 +357,7 @@ func flattenPlacementStrategy(pss []*ecs.PlacementStrategy) []map[string]interfa
 	for _, ps := range pss {
 		c := make(map[string]interface{})
 		c["type"] = *ps.Type
-		c["field"] = *ps.Field
+		c["field"] = strings.ToLower(*ps.Field)
 		results = append(results, c)
 	}
 	return results
diff --git a/builtin/providers/aws/resource_aws_ecs_service_test.go b/builtin/providers/aws/resource_aws_ecs_service_test.go
index 3c1bd2b29..dab45018a 100644
--- a/builtin/providers/aws/resource_aws_ecs_service_test.go
+++ b/builtin/providers/aws/resource_aws_ecs_service_test.go
@@ -445,7 +445,7 @@ resource "aws_ecs_service" "mongo" {
   desired_count = 1
   placement_strategy {
 	type = "binpack"
-	field = "MEMORY"
+	field = "memory"
   }
 }
 `