diff --git a/Random_numbers/include/CGAL/Random_impl.h b/Random_numbers/include/CGAL/Random_impl.h
index 675ed05e814..3c66dc5d31c 100644
--- a/Random_numbers/include/CGAL/Random_impl.h
+++ b/Random_numbers/include/CGAL/Random_impl.h
@@ -23,6 +23,7 @@
 #include <ctime>
 #include <iostream>
 #include <sstream>
+#include <cstdint>
 
 namespace CGAL {