diff --git a/examples/echo/echo-client.cpp b/examples/echo/echo-client.cpp
index 093595f..8fe7ad7 100644
--- a/examples/echo/echo-client.cpp
+++ b/examples/echo/echo-client.cpp
@@ -6,6 +6,7 @@
 #include <iostream>
 #include <pthread.h>
 #include <signal.h>
+#include <stdio.h>
 
 using namespace std;