diff --git a/usr.sbin/arp/arp.c b/usr.sbin/arp/arp.c
index b20235e145d3..3f9c5fc32889 100644
--- a/usr.sbin/arp/arp.c
+++ b/usr.sbin/arp/arp.c
@@ -460,6 +460,7 @@ search(u_long addr, void (*action)(struct sockaddr_dl *sdl,
 		}
 		(*action)(sdl, sin, rtm);
 	}
+	free(buf);
 }
 
 /*