diff --git a/src/vs/base/browser/domSanitize.ts b/src/vs/base/browser/domSanitize.ts
index 8d3b1aebc63..4653d0e3338 100644
--- a/src/vs/base/browser/domSanitize.ts
+++ b/src/vs/base/browser/domSanitize.ts
@@ -330,7 +330,7 @@ function doSanitizeHtml(untrusted: string, config: DomSanitizerConfig | undefine
 			return dompurify.sanitize(untrusted, {
 				...resolvedConfig,
 				RETURN_TRUSTED_TYPE: true
-			});
+			}) as TrustedHTML;
 		}
 	} finally {
 		dompurify.removeAllHooks();