diff --git a/src/svc.c b/src/svc.c
index b4fa4578..68fea45c 100644
--- a/src/svc.c
+++ b/src/svc.c
@@ -25,6 +25,7 @@
 #include <err.h>
 #include <ctype.h>		/* isdigit() */
 #include <time.h>
+#include <signal.h>
 #include <stdlib.h>
 #include <strings.h>
 #include <sys/time.h>