1 files changed, 0 insertions, 3 deletions
diff --git a/csharp/src/Google.Protobuf/WellKnownTypes/Duration.cs b/csharp/src/Google.Protobuf/WellKnownTypes/Duration.cs
index 3c43d634..26c8d2b6 100644
--- a/csharp/src/Google.Protobuf/WellKnownTypes/Duration.cs
+++ b/csharp/src/Google.Protobuf/WellKnownTypes/Duration.cs
@@ -52,9 +52,6 @@ namespace Google.Protobuf.WellKnownTypes {
       get { return Descriptor; }
     }
 
-    private bool _frozen = false;
-    public bool IsFrozen { get { return _frozen; } }
-
     public Duration() {
       OnConstruction();
     }