diff --git a/include/mcut/internal/hmesh.h b/include/mcut/internal/hmesh.h
index 73a58c3..2c01d93 100644
--- a/include/mcut/internal/hmesh.h
+++ b/include/mcut/internal/hmesh.h
@@ -44,6 +44,7 @@
 #include <map>
 #include <memory>
 #include <vector>
+#include <cstdint>
 
 template <typename T>
 class descriptor_t_ {