diff --git a/src/compiler/sys.ts b/src/compiler/sys.ts
index b1923a73a27..5abc19cdbc4 100644
--- a/src/compiler/sys.ts
+++ b/src/compiler/sys.ts
@@ -330,7 +330,7 @@ namespace ts {
     }
 
     /*@internal*/
-    export const ignoredPaths = ["/node_modules/.", "/.git"];
+    export const ignoredPaths = ["/node_modules/.", "/.git", "/.#"];
 
     /*@internal*/
     export interface RecursiveDirectoryWatcherHost {