diff --git a/src/algo/rejecter.cpp b/src/algo/rejecter.cpp
index 7a0b654e093e1057c528787d76dadae46e4f6cb9..74bf91ad6d871a0f3a2341bf8a678af38200a04e 100644
--- a/src/algo/rejecter.cpp
+++ b/src/algo/rejecter.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "rejecter.hpp"
 
 Rejecter::Rejecter(Workload *workload,