diff --git a/src/server.c b/src/server.c
index b17e452..4273a05 100644
--- a/src/server.c
+++ b/src/server.c
@@ -1621,7 +1621,8 @@ static int handle_i(patty_ax25_server *server,
 
         patty_timer_stop(&sock->timer_t2);
 
-        return patty_ax25_sock_send_rr(sock, PATTY_AX25_FRAME_RESPONSE, 0);
+        return frame->pf?
+            patty_ax25_sock_send_rr(sock, PATTY_AX25_FRAME_RESPONSE, 1): 0;
     }
 
     patty_timer_start(&sock->timer_t2);