diff --git a/tests/auto/network-settings.h b/tests/auto/network-settings.h
index 72ff9bbc33..9cf03ccdf4 100644
--- a/tests/auto/network-settings.h
+++ b/tests/auto/network-settings.h
@@ -48,6 +48,7 @@
 #include <sys/types.h>
 #include <sys/socket.h>
 #include <netinet/in.h>
+#include <unistd.h>
 #endif
 
 class QtNetworkSettings