diff --git a/modules/swagger-codegen/src/main/resources/nancyfx/model.mustache b/modules/swagger-codegen/src/main/resources/nancyfx/model.mustache
index 1ee08ce7d70..e0a965b6c9e 100644
--- a/modules/swagger-codegen/src/main/resources/nancyfx/model.mustache
+++ b/modules/swagger-codegen/src/main/resources/nancyfx/model.mustache
@@ -108,7 +108,7 @@ namespace {{packageName}}.Models
             private void Validate()
             {
                 {{#vars}}{{#required}}
-                if ({{_name}} == null)
+                if (_{{name}} == null)
                 {
                     throw new ArgumentException("{{name}} is a required property for {{classname}} and cannot be null");
                 }