diff --git a/src/vs/editor/browser/view/viewPart.ts b/src/vs/editor/browser/view/viewPart.ts
index 7b42820164c..2da12f053ac 100644
--- a/src/vs/editor/browser/view/viewPart.ts
+++ b/src/vs/editor/browser/view/viewPart.ts
@@ -42,11 +42,7 @@ export const enum PartFingerprint {
 export class PartFingerprints {
 
 	public static write(target: Element | FastDomNode<HTMLElement>, partId: PartFingerprint) {
-		if (target instanceof FastDomNode) {
-			target.setAttribute('data-mprt', String(partId));
-		} else {
-			target.setAttribute('data-mprt', String(partId));
-		}
+		target.setAttribute('data-mprt', String(partId));
 	}
 
 	public static read(target: Element): PartFingerprint {