Correct documentation on use of alert pending
diff --git a/include/mbedtls/ssl_internal.h b/include/mbedtls/ssl_internal.h
index 74c709c..d3b426b 100644
--- a/include/mbedtls/ssl_internal.h
+++ b/include/mbedtls/ssl_internal.h
@@ -1735,7 +1735,8 @@
*
* The check for pending alerts must be done by calling
* the function ssl_send_pending_fatal_alert() in ssl_tls.c.
- * Currently, it happens only during the handshake loop.
+ * Currently, it happens only during the handshake loop and after
+ * calling ssl_get_next_record() in the record processing stack.
*
* This function must not be called multiple times without
* sending the pending fatal alerts in between.