diff --git a/port/libusb/main.c b/port/libusb/main.c
index 1dd46dd76..e8140f37b 100644
--- a/port/libusb/main.c
+++ b/port/libusb/main.c
@@ -47,6 +47,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <signal.h>
 
 #include "btstack_config.h"