diff --git a/modules/swagger-codegen/src/main/resources/asyncscala/model.mustache b/modules/swagger-codegen/src/main/resources/asyncscala/model.mustache
index bf63e76658a..68d361c4c59 100644
--- a/modules/swagger-codegen/src/main/resources/asyncscala/model.mustache
+++ b/modules/swagger-codegen/src/main/resources/asyncscala/model.mustache
@@ -7,7 +7,7 @@ import java.util.UUID
 
 {{#model}}
 case class {{classname}} (
-  {{#vars}}{{name}}: {{#isNotRequired}}Option[{{/isNotRequired}}{{datatype}}{{#isNotRequired}}]{{/isNotRequired}}{{#hasMore}},{{/hasMore}}{{#description}}  // {{description}}{{/description}}
+  {{#vars}}{{name}}: {{^required}}Option[{{/required}}{{datatype}}{{^required}}]{{/required}}{{#hasMore}},{{/hasMore}}{{#description}}  // {{description}}{{/description}}
   {{/vars}}
 )
 {{/model}}