diff --git a/include/Swiften/FileTransfer/MyOutgoingSIFileTransfer.h b/include/Swiften/FileTransfer/MyOutgoingSIFileTransfer.h
index 528e739c9761431f41c365380eb62bf36f0b3188..18175b68bb6e3e1cf0f40dc59cb1489dc44c7f42 100644
--- a/include/Swiften/FileTransfer/MyOutgoingSIFileTransfer.h
+++ b/include/Swiften/FileTransfer/MyOutgoingSIFileTransfer.h
@@ -7,7 +7,6 @@
 #pragma once
 
 #include <boost/shared_ptr.hpp>
-#include <boost/signals.hpp>
 
 #include "Swiften/SwiftenCompat.h"
 
@@ -36,7 +35,7 @@ namespace Swift {
 			virtual void stop();
 			virtual void cancel();
 
-			boost::signal<void (const boost::optional<FileTransferError>&)> onFinished;
+			SWIFTEN_SIGNAL_NAMESPACE::signal<void (const boost::optional<FileTransferError>&)> onFinished;
 
 		private:
 			void handleStreamInitiationRequestResponse(StreamInitiation::ref, ErrorPayload::ref);