diff --git a/3rdparty/json11/json11.cpp b/3rdparty/json11/json11.cpp
index a0fcf866..b6c95e04 100644
--- a/3rdparty/json11/json11.cpp
+++ b/3rdparty/json11/json11.cpp
@@ -23,6 +23,7 @@
 #include <cassert>
 #include <cmath>
 #include <cstdlib>
+#include <cstdint>
 #include <cstdio>
 #include <climits>
 #include <cerrno>