From 888e9cb60bc98b740b01a54ad07238d217915931 Mon Sep 17 00:00:00 2001
From: hartmannathan <59230071+hartmannathan@users.noreply.github.com>
Date: Sat, 1 May 2021 04:43:32 -0400
Subject: [PATCH] Comment correction (#21729)

---
 Marlin/src/libs/duration_t.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Marlin/src/libs/duration_t.h b/Marlin/src/libs/duration_t.h
index bd654b7bad..148aa23211 100644
--- a/Marlin/src/libs/duration_t.h
+++ b/Marlin/src/libs/duration_t.h
@@ -115,7 +115,8 @@ struct duration_t {
    * @brief Formats the duration as a string
    * @details String will be formated using a "full" representation of duration
    *
-   * @param buffer The array pointed to must be able to accommodate 21 bytes
+   * @param buffer The array pointed to must be able to accommodate 22 bytes
+   *               (21 for the string, 1 more for the terminating nul)
    *
    * Output examples:
    *  123456789012345678901 (strlen)