diff --git a/code/nel/tools/3d/object_viewer_qt/src/plugins/example/qnel_widget.cpp b/code/nel/tools/3d/object_viewer_qt/src/plugins/example/qnel_widget.cpp
index 4872923db..d512521f7 100644
--- a/code/nel/tools/3d/object_viewer_qt/src/plugins/example/qnel_widget.cpp
+++ b/code/nel/tools/3d/object_viewer_qt/src/plugins/example/qnel_widget.cpp
@@ -60,7 +60,7 @@ QNLWidget::~QNLWidget()
 void QNLWidget::init()
 {
 	// create the driver
-	m_driver = NL3D::UDriver::createDriver(NULL, false, NULL);
+	m_driver = NL3D::UDriver::createDriver(0, false);
 	nlassert(m_driver);
 
 	// initialize the nel 3d viewport
diff --git a/code/ryzom/client/src/interface_v3/interface_expr.cpp b/code/ryzom/client/src/interface_v3/interface_expr.cpp
index 656c0f642..91a6cb7f3 100644
--- a/code/ryzom/client/src/interface_v3/interface_expr.cpp
+++ b/code/ryzom/client/src/interface_v3/interface_expr.cpp
@@ -78,11 +78,11 @@ CInterfaceExprNode *CInterfaceExpr::buildExprTree(const std::string &expr)
 	{
 		std::string	tempStr;
 		formatLuaCall(expr, tempStr);
-		if (buildExprTree(tempStr.c_str(), node) == NULL) return false;
+		if (buildExprTree(tempStr.c_str(), node) == NULL) return NULL;
 	}
 	else
 	{
-		if (buildExprTree(expr.c_str(), node) == NULL) return false;
+		if (buildExprTree(expr.c_str(), node) == NULL) return NULL;
 	}
 
 	return node;
diff --git a/code/ryzom/common/src/game_share/dms.h b/code/ryzom/common/src/game_share/dms.h
index 149c626c8..b53b8626d 100644
--- a/code/ryzom/common/src/game_share/dms.h
+++ b/code/ryzom/common/src/game_share/dms.h
@@ -148,7 +148,7 @@ namespace R2
 	public:
 		CDynamicMapService(	NLMISC::CConfigFile& confFile, NLNET::IModuleSocket * gateway);
 
-		~CDynamicMapService();
+		virtual ~CDynamicMapService();
 
 		static CDynamicMapService* getInstance();
 
diff --git a/code/ryzom/tools/assoc_mem/value.h b/code/ryzom/tools/assoc_mem/value.h
index 321d47a14..96f0fed46 100644
--- a/code/ryzom/tools/assoc_mem/value.h
+++ b/code/ryzom/tools/assoc_mem/value.h
@@ -21,6 +21,8 @@
 
 class IValue {
 	public:
+		virtual ~IValue() { }
+
 		virtual void getValue(IValue &) = 0;
 		virtual void setValue(IValue &) = 0;