From ee5a3088b9f8e4e814a5536f181b875dc3076f59 Mon Sep 17 00:00:00 2001
From: "J. Nick Koston" <nick@home-assistant.io>
Date: Sun, 14 Dec 2025 22:17:45 -0600
Subject: [PATCH] tweak

---
 esphome/components/esp32/preferences.cpp | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/esphome/components/esp32/preferences.cpp b/esphome/components/esp32/preferences.cpp
index b0d2534832..02d7edb606 100644
--- a/esphome/components/esp32/preferences.cpp
+++ b/esphome/components/esp32/preferences.cpp
@@ -4,7 +4,7 @@
 #include "esphome/core/log.h"
 #include "esphome/core/preferences.h"
 #include <nvs_flash.h>
-#include <charconv>
+#include <cinttypes>
 #include <cstring>
 #include <memory>
 #include <vector>
@@ -115,8 +115,7 @@ class ESP32Preferences : public ESPPreferences {
     auto *pref = new ESP32PreferenceBackend();  // NOLINT(cppcoreguidelines-owning-memory)
     pref->nvs_handle = this->nvs_handle;
 
-    auto [ptr, ec] = std::to_chars(pref->key, pref->key + sizeof(pref->key), type);
-    *ptr = '\0';
+    snprintf(pref->key, sizeof(pref->key), "%" PRIu32, type);
 
     return ESPPreferenceObject(pref);
   }