diff --git a/src/file/table-of-contents/sdt-properties.ts b/src/file/table-of-contents/sdt-properties.ts
index 998167d22a..4ee856eda3 100644
--- a/src/file/table-of-contents/sdt-properties.ts
+++ b/src/file/table-of-contents/sdt-properties.ts
@@ -4,7 +4,7 @@ import { StringValueElement, XmlComponent } from "@file/xml-components";
 export class StructuredDocumentTagProperties extends XmlComponent {
     public constructor(alias?: string) {
         super("w:sdtPr");
-        if(typeof alias === 'string'){
+        if (typeof alias === "string") {
             this.root.push(new StringValueElement("w:alias", alias));
         }
     }