diff --git a/example/main.cpp b/example/main.cpp
index fe3fa50..7a6aede 100644
--- a/example/main.cpp
+++ b/example/main.cpp
@@ -1,6 +1,7 @@
 #include <iostream>
 #include <FastString.h>
 #include <assert.h>
+#include <cstdint>
 
 int main()
 {
@@ -99,4 +100,4 @@ int main()
     /* swap */
     l.swap(k);                                          // l is "xyz" and k is "34"
     swap(l, k);                                         // l is "34" and k is "xyz"
-}
\ No newline at end of file
+}