diff --git a/libs/thirdParty/qserialport/src/posix/qserialportnative_posix.cpp b/libs/thirdParty/qserialport/src/posix/qserialportnative_posix.cpp
index e60b2294476c9b0e67c811bb40b896a030e4e644..9a24dfa7e74df642f220bcddef5212e8f94a5e0d 100644
--- a/libs/thirdParty/qserialport/src/posix/qserialportnative_posix.cpp
+++ b/libs/thirdParty/qserialport/src/posix/qserialportnative_posix.cpp
@@ -28,6 +28,7 @@
 #include <QSocketNotifier>
 #include "qserialportnative.h"
 #include "termioshelper.h"
+#include <unistd.h>
 
 namespace {
   const int kMinReadTimeout = 100;