diff --git a/spectrum/src/frontends/xmpp/BlockSerializer.h b/spectrum/src/frontends/xmpp/BlockSerializer.h
new file mode 100644
index 0000000000000000000000000000000000000000..928e6e1a8e87604f29ac8f9d50394b8f36c4c300
--- /dev/null
+++ b/spectrum/src/frontends/xmpp/BlockSerializer.h
@@ -0,0 +1,21 @@
+/*
+ * Copyright (c) 2011 Jan Kaluza
+ * Licensed under the Simplified BSD license.
+ * See Documentation/Licenses/BSD-simplified.txt for more information.
+ */
+
+#pragma once
+
+#include <Swiften/Serializer/GenericPayloadSerializer.h>
+#include <BlockPayload.h>
+
+// This payload is NOT part of ANY XEP and it is only
+// libtransport related extension.
+namespace Transport {
+	class BlockSerializer : public Swift::GenericPayloadSerializer<BlockPayload> {
+		public:
+			BlockSerializer();
+
+			virtual std::string serializePayload(boost::shared_ptr<BlockPayload>)  const;
+	};
+}