diff --git a/src/sock.c b/src/sock.c
index b34654a..16b4858 100644
--- a/src/sock.c
+++ b/src/sock.c
@@ -211,15 +211,11 @@ ssize_t patty_ax25_sock_send(patty_ax25_sock *sock,
     if (sock->mode == PATTY_AX25_SOCK_SABME) {
         buf[offset++] = (control & 0xff00) >> 8;
         buf[offset++] =  control & 0x00ff;
-
-        sock->seq_send = (sock->seq_send + 1) & 0x07;
     } else {
         buf[offset++] = control;
-
-        sock->seq_send = (sock->seq_send + 1) & 0x7f;
     }
 
-    if (PATTY_AX25_CONTROL_INFO(control)) {
+    if (info) {
         buf[offset++] = (uint8_t)sock->proto;
 
         memcpy(buf + offset, info, infolen);
@@ -275,6 +271,8 @@ ssize_t patty_ax25_sock_write(patty_ax25_sock *sock,
         goto error_send;
     }
 
+    patty_ax25_sock_seq_send_incr(sock);
+
     return len;
 
 error_send: