diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3bea197d6b..125170d998 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ## [Unreleased]
 
 ### Fixed
+- Fix the `esp_app_desc!` macro so the reserv3 field is correct for ESP IDF v5.4
 - Fix the `esp_app_desc!` macro so that it properly embeds `CONFIG_ESP_EFUSE_BLOCK_REV_MIN_FULL`/`CONFIG_ESP_EFUSE_BLOCK_REV_MAX_FULL` with recent ESP-IDF versions (5.4+, 5.2.3+, 5.3.2+)
 - Make sure that the `esp_app_desc!` macro fails at build-time if some of the fields cannot fit inside the structure
 - Re-enable "esp_lcd_panel_rgb.h" after >= v5.3 for targets with SOC_LCD_RGB_SUPPORTED
diff --git a/src/app_desc.rs b/src/app_desc.rs
index 0689ec2bf8..1f763c83c6 100644
--- a/src/app_desc.rs
+++ b/src/app_desc.rs
@@ -102,7 +102,7 @@ macro_rules! esp_app_desc {
                     esp_idf_version = "5.2",
                     esp_idf_version = "5.3"
                 )))]
-                reserv3: [0; 4],
+                reserv3: [0; 3],
                 #[cfg(not(any(
                     esp_idf_version_major = "4",
                     esp_idf_version = "5.0",