diff --git a/src/zsolve/VectorArrayAPI.hpp b/src/zsolve/VectorArrayAPI.hpp

index a5cb948..31b3322 100644

--- src/zsolve/VectorArrayAPI.hpp

+++ src/zsolve/VectorArrayAPI.hpp

@@ -28,6 +28,7 @@ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.

 #include "zsolve/Exception.h"

 #include <fstream>

 #include <cstdlib>

+#include <cstdint>

 namespace _4ti2_zsolve_ {