diff --git a/src/gui/src/MainWindow.cpp b/src/gui/src/MainWindow.cpp
index 4cc156abb..2bcf21776 100644
--- a/src/gui/src/MainWindow.cpp
+++ b/src/gui/src/MainWindow.cpp
@@ -670,7 +670,7 @@ void MainWindow::startSynergy()
 
     if (m_AppConfig->getCryptoEnabled()) {
         args << "--enable-crypto";
-        args << "--tls-cert" << m_AppConfig->getTLSCertPath();
+        args << "--tls-cert" <<  QString("\"%1\"").arg(m_AppConfig->getTLSCertPath());
     }
 
 #if defined(Q_OS_WIN)