diff --git a/code/nel/tools/3d/object_viewer/located_bindable_dialog.cpp b/code/nel/tools/3d/object_viewer/located_bindable_dialog.cpp
index 73337e3a5..2242c0684 100644
--- a/code/nel/tools/3d/object_viewer/located_bindable_dialog.cpp
+++ b/code/nel/tools/3d/object_viewer/located_bindable_dialog.cpp
@@ -764,7 +764,7 @@ void CLocatedBindableDialog::updateZBias()
 	m_ZBias.GetWindowText(value);
 	float zbias = 0.f;
 	int dummy; // to test if end of string as no not wanted extra characters
-	if (sscanf((LPCTSTR) (value + "\n0"), "%f\n%d", &zbias, &dummy) == 2)
+	if (_stscanf((LPCTSTR)(value + _T("\n0")), _T("%f\n%d"), &zbias, &dummy) == 2)
 	{
 		NLMISC::safe_cast<NL3D::CPSParticle *>(_Bindable)->setZBias(-zbias);
 	}
diff --git a/code/nel/tools/3d/object_viewer/particle_tree_ctrl.cpp b/code/nel/tools/3d/object_viewer/particle_tree_ctrl.cpp
index 332a5163e..bf382f1e4 100644
--- a/code/nel/tools/3d/object_viewer/particle_tree_ctrl.cpp
+++ b/code/nel/tools/3d/object_viewer/particle_tree_ctrl.cpp
@@ -1147,7 +1147,7 @@ BOOL CParticleTreeCtrl::OnCmdMsg(UINT nID,  int nCode,  void* pExtra,  AFX_CMDHA
 			{
 				float value;		
 				int dummy; // to avoid non numeric characters at the end
-				if (sscanf ((LPCTSTR)(valueDlg.Value + "\n0"),  "%f\n%d",  &value,  &dummy) == 2)
+				if (_stscanf((LPCTSTR)(valueDlg.Value + _T("\n0")), _T("%f\n%d"), &value, &dummy) == 2)
 				{
 					nlassert(getOwnerNode(nt)->getPSPointer());
 					getOwnerNode(nt)->getPSPointer()->setZBias(-value);