diff --git a/CHANGELOG.md b/CHANGELOG.md
index 59fad2f10..c47018705 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -13,6 +13,7 @@ project adheres to [Semantic Versioning](http://semver.org/).
 * Fix error message HTTP response status code in image src setter
 * `roundRect()` shape incorrect when radii were large relative to rectangle size (#2400)
 * Reject loadImage when src is null or invalid (#2304)
+* Fix compilation on GCC 15 by including <cstdint> (#2545)
 
 3.2.0
 ==================
diff --git a/src/CharData.h b/src/CharData.h
index ebc2dd5e1..00fc4effc 100644
--- a/src/CharData.h
+++ b/src/CharData.h
@@ -3,6 +3,8 @@
 
 #pragma once
 
+#include <cstdint>
+
 namespace CharData {
   static constexpr uint8_t Whitespace = 0x1;
   static constexpr uint8_t Newline = 0x2;