diff --git a/src/vs/workbench/api/electron-browser/mainThreadComments.ts b/src/vs/workbench/api/electron-browser/mainThreadComments.ts
index c542fab8669..034344210fc 100644
--- a/src/vs/workbench/api/electron-browser/mainThreadComments.ts
+++ b/src/vs/workbench/api/electron-browser/mainThreadComments.ts
@@ -65,7 +65,8 @@ export class MainThreadComments extends Disposable implements MainThreadComments
 				},
 				provideNewCommentRange: async (model, token) => {
 					return await this.provideNewCommentRange(model);
-				}
+				},
+				onDidChangeCommentThreads: null
 			});
 		});
 	}