diff --git a/cpp/QrCodeGeneratorDemo.cpp b/cpp/QrCodeGeneratorDemo.cpp
index ee2f89d..f126ca4 100644
--- a/cpp/QrCodeGeneratorDemo.cpp
+++ b/cpp/QrCodeGeneratorDemo.cpp
@@ -25,8 +25,10 @@
  *   Software.
  */
 
+#include <cstdint>
 #include <iostream>
 #include <string>
+#include <vector>
 #include "QrCode.hpp"