diff --git a/src/gt4py/cartesian/gtc/gtcpp/gtcpp_codegen.py b/src/gt4py/cartesian/gtc/gtcpp/gtcpp_codegen.py
index 00c3fb16d8..4e56b159d9 100644
--- a/src/gt4py/cartesian/gtc/gtcpp/gtcpp_codegen.py
+++ b/src/gt4py/cartesian/gtc/gtcpp/gtcpp_codegen.py
@@ -288,6 +288,7 @@ def visit_Program(self, node: gtcpp.Program, **kwargs: Any) -> Union[str, Collec
 
     Program = as_mako(
         """
+        #include <cstdint>
         #include <gridtools/stencil/${gt_backend_t}.hpp>
         #include <gridtools/stencil/cartesian.hpp>
         #include <gridtools/common/array.hpp>