diff --git a/modules/openapi-generator/src/main/resources/typescript-node/model.mustache b/modules/openapi-generator/src/main/resources/typescript-node/model.mustache
index 3559593a50c2..c3b8119ec68e 100644
--- a/modules/openapi-generator/src/main/resources/typescript-node/model.mustache
+++ b/modules/openapi-generator/src/main/resources/typescript-node/model.mustache
@@ -18,7 +18,7 @@ export class {{classname}} {{#parent}}extends {{{parent}}} {{/parent}}{
     * {{{description}}}
     */
 {{/description}}
-    '{{name}}'{{^required}}?{{/required}}: {{#isEnum}}{{{datatypeWithEnum}}}{{/isEnum}}{{^isEnum}}{{{dataType}}}{{/isEnum}};
+    '{{name}}'{{^required}}?{{/required}}: {{#isEnum}}{{{datatypeWithEnum}}}{{/isEnum}}{{^isEnum}}{{{dataType}}}{{#isNullable}} | null{{/isNullable}}{{/isEnum}};
 {{/vars}}
 
     {{#discriminator}}
@@ -48,7 +48,7 @@ export class {{classname}} {{#parent}}extends {{{parent}}} {{/parent}}{
         return {{classname}}.attributeTypeMap;
         {{/parent}}
     }
-    {{/isArrayModel}}    
+    {{/isArrayModel}}
 }
 
 {{#hasEnums}}