diff --git a/example/example.cpp b/example/example.cpp
index 01c1611..827386a 100644
--- a/example/example.cpp
+++ b/example/example.cpp
@@ -4,6 +4,7 @@
 #include <cstdlib>
 #include <future>
 #include <iostream>
+#include <thread>
 #include <unistd.h>
 #include <vector>