diff --git a/ot_accesslist.c b/ot_accesslist.c
index e63cff8..0f46a00 100644
--- a/ot_accesslist.c
+++ b/ot_accesslist.c
@@ -5,6 +5,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include <stdio.h>
+#include <signal.h>
 
 /* Libowfat */
 #include "byte.h"