diff --git a/src/Nancy/Json/JsonSerializer.cs b/src/Nancy/Json/JsonSerializer.cs
index 55149ed56e..7792cc2ef5 100644
--- a/src/Nancy/Json/JsonSerializer.cs
+++ b/src/Nancy/Json/JsonSerializer.cs
@@ -105,11 +105,17 @@ void SerializeValueImpl (object obj, StringBuilder output)
 				return;
 			}
 
+#if !__MonoCS__			
 			if (obj.GetType().Name == "RuntimeType")
 			{
 				obj = obj.ToString();
 			}
-
+#else
+			if (obj.GetType().Name == "MonoType")
+			{
+				obj = obj.ToString();
+			}
+#endif
 			Type valueType = obj.GetType ();
 			JavaScriptConverter jsc = serializer.GetConverter (valueType);
 			if (jsc != null) {