diff --git a/csharp/src/Google.Protobuf/Reflection/ReflectionUtil.cs b/csharp/src/Google.Protobuf/Reflection/ReflectionUtil.cs
index 18a70b80b8..feaeba0ee7 100644
--- a/csharp/src/Google.Protobuf/Reflection/ReflectionUtil.cs
+++ b/csharp/src/Google.Protobuf/Reflection/ReflectionUtil.cs
@@ -34,10 +34,6 @@ using Google.Protobuf.Compatibility;
 using System;
 using System.Reflection;
 
-#if NET35
-using Google.Protobuf.Compatibility;
-#endif
-
 namespace Google.Protobuf.Reflection
 {
     /// <summary>