diff --git a/src/support/lockedpool.cpp b/src/support/lockedpool.cpp
index d663f3ea9e..2906d30864 100644
--- a/src/support/lockedpool.cpp
+++ b/src/support/lockedpool.cpp
@@ -23,6 +23,10 @@
 #endif
 
 #include <algorithm>
+#ifdef ARENA_DEBUG
+#include <iomanip>
+#include <iostream>
+#endif
 
 LockedPoolManager* LockedPoolManager::_instance = nullptr;
 std::once_flag LockedPoolManager::init_flag;