Index: src/ch/OptionsDlg.h
===================================================================
diff -u -N -r4fe995b304ea342b50293f92d3c1992b43b820f7 -r8068e0c351055554340ac9755d1bc846893bf2b8
--- src/ch/OptionsDlg.h	(.../OptionsDlg.h)	(revision 4fe995b304ea342b50293f92d3c1992b43b820f7)
+++ src/ch/OptionsDlg.h	(.../OptionsDlg.h)	(revision 8068e0c351055554340ac9755d1bc846893bf2b8)
@@ -29,7 +29,7 @@
 class COptionsDlg : public ictranslate::CLanguageDialog
 {
 public:
-	explicit COptionsDlg(CWnd* pParent = NULL);   // standard constructor
+	explicit COptionsDlg(CWnd* pParent = nullptr);   // standard constructor
 
 	virtual void OnLanguageChanged();