diff --git a/include/wx/defs.h b/include/wx/defs.h
index 962def7d5b..ceba1f7d40 100644
--- a/include/wx/defs.h
+++ b/include/wx/defs.h
@@ -695,6 +695,29 @@ typedef short int WXTYPE;
 #   define wxGCC_WARNING_RESTORE(x)
 #endif
 
+/*
+   Macros to suppress and restore clang warning only when it is valid.
+
+   Example:
+        wxCLANG_WARNING_SUPPRESS(inconsistent-missing-override)
+        virtual wxClassInfo *GetClassInfo() const
+        wxCLANG_WARNING_RESTORE(inconsistent-missing-override)
+*/
+#if defined(__has_warning)
+#    define wxCLANG_HAS_WARNING(x) __has_warning(x) /* allow macro expansion for the warning name */
+#    define wxCLANG_IF_VALID_WARNING(x,y) \
+         wxCONCAT(wxCLANG_IF_VALID_WARNING_,wxCLANG_HAS_WARNING(wxSTRINGIZE(wxCONCAT(-W,x))))(y)
+#    define wxCLANG_IF_VALID_WARNING_0(x)
+#    define wxCLANG_IF_VALID_WARNING_1(x) x
+#    define wxCLANG_WARNING_SUPPRESS(x) \
+         wxCLANG_IF_VALID_WARNING(x,wxGCC_WARNING_SUPPRESS(x))
+#    define wxCLANG_WARNING_RESTORE(x) \
+         wxCLANG_IF_VALID_WARNING(x,wxGCC_WARNING_RESTORE(x))
+#else
+#    define wxCLANG_WARNING_SUPPRESS(x)
+#    define wxCLANG_WARNING_RESTORE(x)
+#endif
+
 /*
     Combination of the two variants above: should be used for deprecated
     functions which are defined inline and are used by wxWidgets itself.
diff --git a/include/wx/richtext/richtextuicustomization.h b/include/wx/richtext/richtextuicustomization.h
index 92c42d7b1f..d9fadfc808 100644
--- a/include/wx/richtext/richtextuicustomization.h
+++ b/include/wx/richtext/richtextuicustomization.h
@@ -103,11 +103,13 @@ protected:
 /// of the formatting dialog.
 
 #define DECLARE_HELP_PROVISION() \
+    wxCLANG_WARNING_SUPPRESS(inconsistent-missing-override) \
     virtual long GetHelpId() const { return sm_helpInfo.GetHelpId(); } \
     virtual void SetHelpId(long id) { sm_helpInfo.SetHelpId(id); } \
     virtual wxRichTextUICustomization* GetUICustomization() const { return sm_helpInfo.GetUICustomization(); } \
     virtual void SetUICustomization(wxRichTextUICustomization* customization) { sm_helpInfo.SetUICustomization(customization); } \
     virtual bool ShowHelp(wxWindow* win) { return sm_helpInfo.ShowHelp(win); } \
+    wxCLANG_WARNING_RESTORE(inconsistent-missing-override) \
 public: \
     static wxRichTextHelpInfo& GetHelpInfo() { return sm_helpInfo; }\
 protected: \
diff --git a/include/wx/rtti.h b/include/wx/rtti.h
index 51017baa2f..308b65767b 100644
--- a/include/wx/rtti.h
+++ b/include/wx/rtti.h
@@ -128,7 +128,9 @@ WXDLLIMPEXP_BASE wxObject *wxCreateDynamicObject(const wxString& name);
 #define wxDECLARE_ABSTRACT_CLASS(name)                                        \
     public:                                                                   \
         static wxClassInfo ms_classInfo;                                      \
-        virtual wxClassInfo *GetClassInfo() const
+        wxCLANG_WARNING_SUPPRESS(inconsistent-missing-override)               \
+        virtual wxClassInfo *GetClassInfo() const                             \
+        wxCLANG_WARNING_RESTORE(inconsistent-missing-override)
 
 #define wxDECLARE_DYNAMIC_CLASS_NO_ASSIGN(name)                               \
     wxDECLARE_NO_ASSIGN_CLASS(name);                                          \