diff --git a/ci/test/00_setup_env_native_asan.sh b/ci/test/00_setup_env_native_asan.sh
index 38e5e6871..b354940d3 100644
--- a/ci/test/00_setup_env_native_asan.sh
+++ b/ci/test/00_setup_env_native_asan.sh
@@ -9,4 +9,4 @@ export LC_ALL=C.UTF-8
 export PACKAGES="clang llvm python3-zmq qtbase5-dev qttools5-dev-tools libevent-dev bsdmainutils libboost-system-dev libboost-filesystem-dev libboost-chrono-dev libboost-test-dev libboost-thread-dev libdb5.3++-dev libminiupnpc-dev libzmq3-dev libqrencode-dev"
 export NO_DEPENDS=1
 export GOAL="install"
-export BITCOIN_CONFIG="--enable-zmq --with-incompatible-bdb --with-gui=qt5 CPPFLAGS=-DDEBUG_LOCKORDER --with-sanitizers=address,integer,undefined CC=clang CXX=clang++"
+export BITCOIN_CONFIG="--enable-zmq --with-incompatible-bdb --with-gui=qt5 CPPFLAGS='-DARENA_DEBUG -DDEBUG_LOCKORDER' --with-sanitizers=address,integer,undefined CC=clang CXX=clang++"
diff --git a/ci/test/00_setup_env_native_tsan.sh b/ci/test/00_setup_env_native_tsan.sh
index 9c38e87b4..f7a16206a 100644
--- a/ci/test/00_setup_env_native_tsan.sh
+++ b/ci/test/00_setup_env_native_tsan.sh
@@ -10,4 +10,4 @@ export DOCKER_NAME_TAG=ubuntu:16.04
 export PACKAGES="clang llvm python3-zmq qtbase5-dev qttools5-dev-tools libevent-dev bsdmainutils libboost-system-dev libboost-filesystem-dev libboost-chrono-dev libboost-test-dev libboost-thread-dev libdb5.3++-dev libminiupnpc-dev libzmq3-dev libqrencode-dev"
 export NO_DEPENDS=1
 export GOAL="install"
-export BITCOIN_CONFIG="--enable-zmq --disable-wallet --with-gui=qt5 CPPFLAGS=-DDEBUG_LOCKORDER --with-sanitizers=thread --disable-hardening --disable-asm CC=clang CXX=clang++"
+export BITCOIN_CONFIG="--enable-zmq --disable-wallet --with-gui=qt5 CPPFLAGS='-DARENA_DEBUG -DDEBUG_LOCKORDER' --with-sanitizers=thread --disable-hardening --disable-asm CC=clang CXX=clang++"
diff --git a/src/support/lockedpool.cpp b/src/support/lockedpool.cpp
index 5c2050e4a..85e3351e7 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;
@@ -137,7 +141,7 @@ Arena::Stats Arena::stats() const
 }
 
 #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 <<
@@ -149,7 +153,7 @@ void Arena::walk() const
         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