diff --git a/src/vs/editor/browser/viewParts/overviewRuler/decorationsOverviewRuler.ts b/src/vs/editor/browser/viewParts/overviewRuler/decorationsOverviewRuler.ts
index 48925ee30aa..7ca6cd14edc 100644
--- a/src/vs/editor/browser/viewParts/overviewRuler/decorationsOverviewRuler.ts
+++ b/src/vs/editor/browser/viewParts/overviewRuler/decorationsOverviewRuler.ts
@@ -207,6 +207,7 @@ export class DecorationsOverviewRuler extends ViewPart {
 		this._domNode.setClassName('decorationsOverviewRuler');
 		this._domNode.setPosition('absolute');
 		this._domNode.setLayerHinting(true);
+		this._domNode.setAttribute('aria-hidden', 'true');
 
 		this._settings = null;
 		this._updateSettings(false);