diff --git a/src/vs/editor/contrib/documentSymbols/outlineTree.ts b/src/vs/editor/contrib/documentSymbols/outlineTree.ts
index 72f66dd91e2..6737e50335b 100644
--- a/src/vs/editor/contrib/documentSymbols/outlineTree.ts
+++ b/src/vs/editor/contrib/documentSymbols/outlineTree.ts
@@ -23,7 +23,7 @@ import { MarkerSeverity } from 'vs/platform/markers/common/markers';
 import { listErrorForeground, listWarningForeground } from 'vs/platform/theme/common/colorRegistry';
 import { IThemeService } from 'vs/platform/theme/common/themeService';
 
-export enum OutlineItemCompareType {
+export const enum OutlineItemCompareType {
 	ByPosition,
 	ByName,
 	ByKind
diff --git a/src/vs/editor/contrib/snippet/snippetParser.ts b/src/vs/editor/contrib/snippet/snippetParser.ts
index bf034b00bb3..c839cffd343 100644
--- a/src/vs/editor/contrib/snippet/snippetParser.ts
+++ b/src/vs/editor/contrib/snippet/snippetParser.ts
@@ -7,7 +7,7 @@
 
 import { CharCode } from 'vs/base/common/charCode';
 
-export enum TokenType {
+export const enum TokenType {
 	Dollar,
 	Colon,
 	Comma,