diff --git a/types/src/main.ts b/types/src/main.ts
index f8d928f14..9b7140d9f 100644
--- a/types/src/main.ts
+++ b/types/src/main.ts
@@ -1521,7 +1521,8 @@ export namespace SnippetTextEdit {
 		return Is.objectLiteral(candidate)
 			&& Range.is(candidate.range)
 			&& StringValue.isSnippet(candidate.snippet)
-			&& (ChangeAnnotation.is(candidate.annotationId) || ChangeAnnotationIdentifier.is(candidate.annotationId));
+			&& (candidate.annotationId === undefined ||
+				(ChangeAnnotation.is(candidate.annotationId) || ChangeAnnotationIdentifier.is(candidate.annotationId)));
 	}
 }