diff --git a/source/birchwood/protocol/messages.d b/source/birchwood/protocol/messages.d
index 3edeb4e..a289c4f 100644
--- a/source/birchwood/protocol/messages.d
+++ b/source/birchwood/protocol/messages.d
@@ -671,7 +671,7 @@ unittest
 
     try
     {
-        message.encode(ChecksMode.HARCORE);
+        message.encode(ChecksMode.HARDCORE);
         assert(false);
     }
     catch(BirchwoodException e)