diff --git a/example-clients/tw.c b/example-clients/tw.c
index 623ff240..edc7ef31 100644
--- a/example-clients/tw.c
+++ b/example-clients/tw.c
@@ -9,6 +9,7 @@
 #include <unistd.h>
 #include <stdlib.h>
 #include <string.h>
+#include <signal.h>
 
 #include <jack/jack.h>