1 files changed, 1 insertions, 1 deletions
diff --git a/Swift/Controllers/UnitTest/MockChatWindow.h b/Swift/Controllers/UnitTest/MockChatWindow.h
index b4588e7..e535eca 100644
--- a/Swift/Controllers/UnitTest/MockChatWindow.h
+++ b/Swift/Controllers/UnitTest/MockChatWindow.h
@@ -43,7 +43,7 @@ namespace Swift {
             virtual void replaceSystemMessage(const ChatMessage& /*message*/, const std::string& /*id*/, const TimestampBehaviour /*timestampBehaviour*/) {}
 
             // File transfer related stuff
-            virtual std::string addFileTransfer(const std::string& /*senderName*/, bool /*senderIsSelf*/,const std::string& /*filename*/, const boost::uintmax_t /*sizeInBytes*/, const std::string& /*description*/) { return 0; }
+            virtual std::string addFileTransfer(const std::string& /*senderName*/, bool /*senderIsSelf*/,const std::string& /*filename*/, const boost::uintmax_t /*sizeInBytes*/, const std::string& /*description*/) { return nullptr; }
             virtual void setFileTransferProgress(std::string /*id*/, const int /*alreadyTransferedBytes*/) { }
             virtual void setFileTransferStatus(std::string /*id*/, const FileTransferState /*state*/, const std::string& /*msg*/) { }