diff --git a/tools/dhtchat.cpp b/tools/dhtchat.cpp
index 91351934..e1681157 100644
--- a/tools/dhtchat.cpp
+++ b/tools/dhtchat.cpp
@@ -38,6 +38,7 @@ extern "C" {
 #include <iostream>
 #include <string>
 #include <chrono>
+#include <random>
 
 #include <ctime>