diff --git a/src/mcut/include/mcut/internal/hmesh.h b/src/mcut/include/mcut/internal/hmesh.h
index 24c742c8c..b8eb037ee 100644
--- a/src/mcut/include/mcut/internal/hmesh.h
+++ b/src/mcut/include/mcut/internal/hmesh.h
@@ -31,6 +31,7 @@
 #include <map>
 #include <memory>
 #include <vector>
+#include <cstdint>
 
 template <typename T>
 class descriptor_t_ {