diff --git a/lib/irrlicht/include/matrix4.h b/lib/irrlicht/include/matrix4.h
index c386da82d..8ff6501a8 100644
--- a/lib/irrlicht/include/matrix4.h
+++ b/lib/irrlicht/include/matrix4.h
@@ -12,6 +12,7 @@
 #include "aabbox3d.h"
 #include "rect.h"
 #include "irrString.h"
+#include <cstdint>
 #if defined(WIN32) && (defined(__x86_64__) || defined(_M_X64) || defined(__i386) || defined(_M_IX86))
 #include <intrin.h>
 #endif