diff --git a/src/VisualStudio/VisualBasic/Impl/ProjectSystemShim/VisualBasicProject.vb b/src/VisualStudio/VisualBasic/Impl/ProjectSystemShim/VisualBasicProject.vb
index f2f92c3215684e89d2ba27f7839354649b0023f9..2662a36214537d5e6748f1d683f6d8b6cc71e270 100644
--- a/src/VisualStudio/VisualBasic/Impl/ProjectSystemShim/VisualBasicProject.vb
+++ b/src/VisualStudio/VisualBasic/Impl/ProjectSystemShim/VisualBasicProject.vb
@@ -1,6 +1,5 @@
 ' Copyright (c) Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information.
 
-Imports System.Collections.Concurrent
 Imports System.Runtime.InteropServices
 Imports System.Runtime.InteropServices.ComTypes
 Imports System.Threading