diff --git a/src/fsharp/FSharp.Core.Unittests/FSharp.Core/RecordTypes.fs b/src/fsharp/FSharp.Core.Unittests/FSharp.Core/RecordTypes.fs
index 6b301d8113e..91c528d2964 100644
--- a/src/fsharp/FSharp.Core.Unittests/FSharp.Core/RecordTypes.fs
+++ b/src/fsharp/FSharp.Core.Unittests/FSharp.Core/RecordTypes.fs
@@ -9,6 +9,7 @@ open System.Runtime.InteropServices
 open NUnit.Framework
 open FsCheck
 open FsCheck.PropOperators
+open FSharp.Reflection.FSharpReflectionExtensions
 
 type Record =
     {   A: int