diff --git a/thirdparty/vhacd/inc/vhacdICHull.h b/thirdparty/vhacd/inc/vhacdICHull.h
index 132bdcfb3e..4075a9e054 100644
--- a/thirdparty/vhacd/inc/vhacdICHull.h
+++ b/thirdparty/vhacd/inc/vhacdICHull.h
@@ -18,6 +18,8 @@
 #include "vhacdManifoldMesh.h"
 #include "vhacdVector.h"
 
+#include <cstdint>
+
 namespace VHACD {
 //!    Incremental Convex Hull algorithm (cf. http://cs.smith.edu/~orourke/books/ftp.html ).
 enum ICHullError {
diff --git a/thirdparty/vhacd/inc/vhacdManifoldMesh.h b/thirdparty/vhacd/inc/vhacdManifoldMesh.h
index a48f53c5c5..3f9d039470 100644
--- a/thirdparty/vhacd/inc/vhacdManifoldMesh.h
+++ b/thirdparty/vhacd/inc/vhacdManifoldMesh.h
@@ -18,6 +18,9 @@ All rights reserved.
 #include "vhacdCircularList.h"
 #include "vhacdSArray.h"
 #include "vhacdVector.h"
+
+#include <cstdint>
+
 namespace VHACD {
 class TMMTriangle;
 class TMMEdge;