diff --git a/ui/qt/main_window_slots.cpp b/ui/qt/main_window_slots.cpp
index 7619ce555d..84c467c857 100644
--- a/ui/qt/main_window_slots.cpp
+++ b/ui/qt/main_window_slots.cpp
@@ -21,8 +21,13 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
 
-#include <unistd.h>
+#ifdef HAVE_FCNTL_H
 #include <fcntl.h>
+#endif
+
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
 
 #include "main_window.h"
 #include "ui_main_window.h"