diff -Naur Trilinos-trilinos-release-14-0-0_or/packages/teuchos/core/src/Teuchos_BigUIntDecl.hpp Trilinos-trilinos-release-14-0-0/packages/teuchos/core/src/Teuchos_BigUIntDecl.hpp
--- Trilinos-trilinos-release-14-0-0_or/packages/teuchos/core/src/Teuchos_BigUIntDecl.hpp       2023-06-14 22:54:06.565526085 +0200
+++ Trilinos-trilinos-release-14-0-0/packages/teuchos/core/src/Teuchos_BigUIntDecl.hpp  2023-06-14 22:54:26.028613299 +0200
@@ -43,6 +43,7 @@
 #define TEUCHOS_BIG_UINT_DECL_HPP
 
 #include <iosfwd>
+#include <cstdint>
 
 /*! \file Teuchos_BigUIntDecl.hpp
     \brief Arbitrary-precision unsigned integer declaration.