diff --git a/doc/utf8cpp.html b/doc/utf8cpp.html
index caf5253..5376e55 100644
--- a/doc/utf8cpp.html
+++ b/doc/utf8cpp.html
@@ -105,6 +105,7 @@
#include <iostream>
#include <string>
#include <vector>
+#include "utf8.h"
using namespace std;
int main()
{