diff --git a/dev-cpp/json11/files/json11-1.0.0-include-cstdint.patch b/dev-cpp/json11/files/json11-1.0.0-include-cstdint.patch
new file mode 100644
index 0000000000000..29648cf15825c
--- /dev/null
+++ b/dev-cpp/json11/files/json11-1.0.0-include-cstdint.patch
@@ -0,0 +1,12 @@
+diff --git a/json11.cpp b/json11.cpp
+index 9647846..8266a14 100644
+--- a/json11.cpp
++++ b/json11.cpp
+@@ -22,6 +22,7 @@
+ #include "json11.hpp"
+ #include <cassert>
+ #include <cmath>
++#include <cstdint>
+ #include <cstdlib>
+ #include <cstdio>
+ #include <limits>
diff --git a/dev-cpp/json11/json11-1.0.0-r1.ebuild b/dev-cpp/json11/json11-1.0.0-r1.ebuild
index ab8457f641aa3..66b400e6f1bdd 100644
--- a/dev-cpp/json11/json11-1.0.0-r1.ebuild
+++ b/dev-cpp/json11/json11-1.0.0-r1.ebuild
@@ -1,4 +1,4 @@
-# Copyright 2022-2023 Gentoo Authors
+# Copyright 2022-2024 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI=8
@@ -16,4 +16,5 @@ KEYWORDS="amd64 x86"
 PATCHES=(
 	"${FILESDIR}"/${P}-fix-multiarch-install.patch
 	"${FILESDIR}"/${PN}-1.0.0-json11.pc-do-not-state-the-defaults.patch
+	"${FILESDIR}"/${PN}-1.0.0-include-cstdint.patch
 )