diff --git a/whois.c b/whois.c
index 4e70c2d..350a56a 100644
--- a/whois.c
+++ b/whois.c
@@ -18,6 +18,7 @@
 #include "config.h"
 #include <string.h>
 #include <ctype.h>
+#include <sys/time.h>
 #include <sys/types.h>
 #include <sys/socket.h>
 #include <netinet/in.h>