diff --git a/usr.sbin/ndp/ndp.h b/usr.sbin/ndp/ndp.h
--- a/usr.sbin/ndp/ndp.h
+++ b/usr.sbin/ndp/ndp.h
@@ -10,6 +10,7 @@
 	bool tflag;
 	int flags;
 	time_t expire_time;
+	int repeat;
 };
 
 extern struct ndp_opts opts;
diff --git a/usr.sbin/ndp/ndp.c b/usr.sbin/ndp/ndp.c
--- a/usr.sbin/ndp/ndp.c
+++ b/usr.sbin/ndp/ndp.c
@@ -121,7 +121,6 @@
 static pid_t pid;
 static int32_t thiszone;	/* time difference with gmt */
 static int s = -1;
-static int repeat = 0;
 
 static char host_buf[NI_MAXHOST];	/* getnameinfo() */
 static char ifix_buf[IFNAMSIZ];		/* if_indextoname() */
@@ -249,8 +248,8 @@
 				/*NOTREACHED*/
 			}
 			mode = 'a';
-			repeat = atoi(optarg);
-			if (repeat < 0) {
+			opts.repeat = atoi(optarg);
+			if (opts.repeat < 0) {
 				usage();
 				/*NOTREACHED*/
 			}
@@ -828,10 +827,10 @@
 	if (buf != NULL)
 		free(buf);
 
-	if (repeat) {
+	if (opts.repeat) {
 		xo_emit("\n");
 		xo_flush();
-		sleep(repeat);
+		sleep(opts.repeat);
 		goto again;
 	}