diff --git a/src/vs/workbench/api/node/extHostFileSystemEventService.ts b/src/vs/workbench/api/node/extHostFileSystemEventService.ts
index 718daa93cd900ba52c45faf97aed9d052c64d202..ac3e60a7247b82f90fe52f40c21a2a2e0fdfc107 100644
--- a/src/vs/workbench/api/node/extHostFileSystemEventService.ts
+++ b/src/vs/workbench/api/node/extHostFileSystemEventService.ts
@@ -99,7 +99,7 @@ export class ExtHostFileSystemEventService extends ExtHostFileSystemEventService
 		return new FileSystemWatcher(this._emitter.event, globPattern, ignoreCreateEvents, ignoreChangeEvents, ignoreDeleteEvents);
 	}
 
-	_onFileEvent(events: FileSystemEvents) {
+	$onFileEvent(events: FileSystemEvents) {
 		this._emitter.fire(events);
 	}
 }