diff --git a/code/nel/src/3d/animation.cpp b/code/nel/src/3d/animation.cpp
index a604d2bde..b33f337d2 100644
--- a/code/nel/src/3d/animation.cpp
+++ b/code/nel/src/3d/animation.cpp
@@ -30,6 +30,9 @@
 using namespace std;
 using namespace NLMISC;
 
+#ifdef DEBUG_NEW
+#define new DEBUG_NEW
+#endif
 
 namespace NL3D
 {
diff --git a/code/nel/src/3d/animation_optimizer.cpp b/code/nel/src/3d/animation_optimizer.cpp
index 726086f8b..9205fde39 100644
--- a/code/nel/src/3d/animation_optimizer.cpp
+++ b/code/nel/src/3d/animation_optimizer.cpp
@@ -29,6 +29,9 @@
 using	namespace NLMISC;
 using	namespace std;
 
+#ifdef DEBUG_NEW
+#define new DEBUG_NEW
+#endif
 
 namespace NL3D
 {
diff --git a/code/nel/src/3d/cloud.cpp b/code/nel/src/3d/cloud.cpp
index eb53589ce..bfd83ba80 100644
--- a/code/nel/src/3d/cloud.cpp
+++ b/code/nel/src/3d/cloud.cpp
@@ -25,6 +25,10 @@
 
 using namespace NLMISC;
 
+#ifdef DEBUG_NEW
+#define new DEBUG_NEW
+#endif
+
 namespace NL3D
 {
 
diff --git a/code/nel/src/3d/driver/direct3d/stddirect3d.h b/code/nel/src/3d/driver/direct3d/stddirect3d.h
index c7b6f7f3e..366627b44 100644
--- a/code/nel/src/3d/driver/direct3d/stddirect3d.h
+++ b/code/nel/src/3d/driver/direct3d/stddirect3d.h
@@ -14,15 +14,14 @@
 // You should have received a copy of the GNU Affero General Public License
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-// Default NeL includes
-#include "nel/misc/types_nl.h"
+#ifndef STDDIRECT3D_H
+#define STDDIRECT3D_H
 
-#ifdef NL_OS_WINDOWS
-#	define WIN32_LEAN_AND_MEAN
-#	ifndef NL_COMP_MINGW
-#		define NOMINMAX
-#	endif
-#	include <windows.h>
+#if defined(_MSC_VER) && defined(_DEBUG)
+	#define _CRTDBG_MAP_ALLOC
+	#include <stdlib.h>
+	#include <crtdbg.h>
+	#define DEBUG_NEW new(_NORMAL_BLOCK, __FILE__, __LINE__)
 #endif
 
 // System includes
@@ -42,16 +41,14 @@
 #include <deque>
 #include <limits>
 
+// Default NeL includes
+#include "nel/misc/types_nl.h"
 
 #ifdef NL_DEBUG
 	// add Direct3D debug infos
 	#define D3D_DEBUG_INFO
 #endif
 
-// Directx includes
-#include <d3d9.h>
-#include <d3dx9math.h>
-
 // NeL includes
 #include "nel/misc/common.h"
 #include "nel/misc/debug.h"
@@ -59,3 +56,17 @@
 #include "nel/misc/mem_stream.h"
 #include "nel/misc/time_nl.h"
 #include "nel/misc/command.h"
+
+#ifdef NL_OS_WINDOWS
+#	define WIN32_LEAN_AND_MEAN
+#	ifndef NL_COMP_MINGW
+#		define NOMINMAX
+#	endif
+#	include <windows.h>
+#endif
+
+// Directx includes
+#include <d3d9.h>
+#include <d3dx9math.h>
+
+#endif
diff --git a/code/nel/src/sound/driver/xaudio2/stdxaudio2.h b/code/nel/src/sound/driver/xaudio2/stdxaudio2.h
index 76b2a13d8..f6e55d0aa 100644
--- a/code/nel/src/sound/driver/xaudio2/stdxaudio2.h
+++ b/code/nel/src/sound/driver/xaudio2/stdxaudio2.h
@@ -17,7 +17,12 @@
 #ifndef NLSOUND_STDPCH_XAUDIO2_H
 #define NLSOUND_STDPCH_XAUDIO2_H
 
-#include "nel/misc/types_nl.h"
+#if defined(_MSC_VER) && defined(_DEBUG)
+	#define _CRTDBG_MAP_ALLOC
+	#include <stdlib.h>
+	#include <crtdbg.h>
+	#define DEBUG_NEW new(_NORMAL_BLOCK, __FILE__, __LINE__)
+#endif
 
 // STL includes
 #include <iostream>
@@ -27,6 +32,8 @@
 #include <limits>
 #include <intrin.h>
 
+#include "nel/misc/types_nl.h"
+
 // 3rd Party Includes
 #include <basetyps.h>
 #define XAUDIO2_HELPER_FUNCTIONS
diff --git a/code/ryzom/client/src/client.cpp b/code/ryzom/client/src/client.cpp
index f2eaf64c0..f262a74af 100644
--- a/code/ryzom/client/src/client.cpp
+++ b/code/ryzom/client/src/client.cpp
@@ -143,6 +143,10 @@ int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE /* hPrevInstance */, LPSTR cm
 int main(int argc, char **argv)
 #endif
 {
+#if defined(_MSC_VER) && defined(_DEBUG)
+	_CrtSetDbgFlag (_CRTDBG_ALLOC_MEM_DF | _CRTDBG_LEAK_CHECK_DF);
+#endif
+
 	// init the Nel context
 	CApplicationContext *appContext = new CApplicationContext;