diff --git a/src/DomainDiscovery.cpp b/src/DomainDiscovery.cpp
index af47027..b612dcd 100644
--- a/src/DomainDiscovery.cpp
+++ b/src/DomainDiscovery.cpp
@@ -1,5 +1,6 @@
 #include "DomainDiscovery.hpp"
 
+#include <iostream>
 #include <string>
 #include <vector>
 #include <sstream>