diff --git a/src/gui/test_menu.cpp b/src/gui/test_menu.cpp
index bb6e3aae7..d0e3419be 100644
--- a/src/gui/test_menu.cpp
+++ b/src/gui/test_menu.cpp
@@ -40,6 +40,7 @@
 
 #include <cs_api.h>
 
+#include <unistd.h>
 #include <sys/ioctl.h>
 #include <net/if.h>
 #include <arpa/inet.h>