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_ {