diff --git a/src/kiss.c b/src/kiss.c
index 903ba77..dc0ab5d 100644
--- a/src/kiss.c
+++ b/src/kiss.c
@@ -210,10 +210,17 @@ ssize_t patty_kiss_tnc_recv(patty_kiss_tnc *tnc, void **frame, int *port) {
      */
     memset(tnc->frame, '\0', tnc->bufsz);
 
+    /*
+     * Try to decode the TNC buffer into the packet.
+     */
     if ((decoded = tnc_decode(tnc, tnc->frame, &framelen, port)) < 0) {
         goto error_io;
     }
 
+    /*
+     * If we have decoded frame data, then flush the buffer up to the point of
+     * the next frame start, if present.
+     */
     if (decoded) {
         tnc_flush(tnc, decoded);
     }