diff --git a/src/server.c b/src/server.c
index 0838f47..0b43bf0 100644
--- a/src/server.c
+++ b/src/server.c
@@ -1230,16 +1230,8 @@ static int handle_i(patty_ax25_server *server,
                     patty_ax25_if *iface,
                     patty_ax25_sock *sock,
                     patty_ax25_frame *frame) {
-    if (sock == NULL) {
-        return 0;
-    }
-
-    if (sock->status != PATTY_AX25_SOCK_ESTABLISHED) {
-        /*
-         * TODO: Figure out how to respond to a packet sent to a socket not
-         * in an established state
-         */
-        return 0;
+    if (sock == NULL || sock->status != PATTY_AX25_SOCK_ESTABLISHED) {
+        return reply_dm(iface, frame, PATTY_AX25_FRAME_FINAL);
     }
 
     /*