diff --git a/src/vs/editor/browser/view/viewLayer.ts b/src/vs/editor/browser/view/viewLayer.ts
index 5ab9784cd4ee5cff5bc3dd1b37cf7c01dc8dfccb..89de8468f212f67e2e33f41950516cda63fe5db6 100644
--- a/src/vs/editor/browser/view/viewLayer.ts
+++ b/src/vs/editor/browser/view/viewLayer.ts
@@ -530,6 +530,9 @@ class ViewLayerRenderer<T extends IVisibleLine> {
 	private _finishRenderingInvalidLines(ctx: IRendererContext<T>, invalidLinesHTML: string, wasInvalid: boolean[]): void {
 		const hugeDomNode = document.createElement('div');
 
+		if (ViewLayerRenderer._ttPolicy) {
+			invalidLinesHTML = ViewLayerRenderer._ttPolicy.createHTML(invalidLinesHTML) as unknown as string;
+		}
 		hugeDomNode.innerHTML = invalidLinesHTML;
 
 		for (let i = 0; i < ctx.linesLength; i++) {