diff --git a/src/support/lockedpool.cpp b/src/support/lockedpool.cpp
--- a/src/support/lockedpool.cpp
+++ b/src/support/lockedpool.cpp
@@ -27,6 +27,10 @@
 #endif
 
 #include <algorithm>
+#ifdef ARENA_DEBUG
+#include <iomanip>
+#include <iostream>
+#endif
 
 LockedPoolManager *LockedPoolManager::_instance = nullptr;
 std::once_flag LockedPoolManager::init_flag;
@@ -142,7 +146,7 @@
 }
 
 #ifdef ARENA_DEBUG
-static void printchunk(char *base, size_t sz, bool used) {
+static void printchunk(void *base, size_t sz, bool used) {
     std::cout << "0x" << std::hex << std::setw(16) << std::setfill('0') << base
               << " 0x" << std::hex << std::setw(16) << std::setfill('0') << sz
               << " 0x" << used << std::endl;
@@ -152,7 +156,7 @@
         printchunk(chunk.first, chunk.second, true);
     std::cout << std::endl;
     for (const auto &chunk : chunks_free)
-        printchunk(chunk.first, chunk.second, false);
+        printchunk(chunk.first, chunk.second->first, false);
     std::cout << std::endl;
 }
 #endif