diff --git a/src/downloadthread.cpp b/src/downloadthread.cpp
index c9ec8e6..73fcda1 100644
--- a/src/downloadthread.cpp
+++ b/src/downloadthread.cpp
@@ -314,7 +314,7 @@ bool DownloadThread::_openAndPrepareDevice()
         if (!_file.seek(knownsize-emptyMB.size())
                 || !_file.write(emptyMB.data(), emptyMB.size())
                 || !_file.flush()
-                || !::fsync(_file.handle()))
+                || ::fsync(_file.handle()))
         {
             emit error(tr("Write error while trying to zero out last part of card.<br>"
                           "Card could be advertising wrong capacity (possible counterfeit)."));