--- a/plugins/ppp_unix.c
+++ b/plugins/ppp_unix.c
@@ -888,6 +888,8 @@ static int ppp_unix_pppd_spawn(struct pp
 
 		if (ppp->ppp_profile_data->proxy_arp) {
 			argv[arg++] = "proxyarp";
+		} else {
+			argv[arg++] = "noproxyarp";
 		}
 
 		argv[arg++] = "plugin";