--- arpwatch-3.9.orig/report.c	2023-09-05 19:50:56.000000000 +0200
+++ arpwatch-3.9/report.c	2026-05-13 07:37:39.650674968 +0200
@@ -39,6 +39,7 @@ static const char rcsid[] __attribute__(
 #include <sys/socket.h>
 #include <sys/time.h>
 #include <sys/wait.h>
+#include <time.h>
 
 #if __STDC__
 struct mbuf;
