diff --git a/oox/source/core/filterdetect.cxx b/oox/source/core/filterdetect.cxx
index eb7d2182566a..cad537f7d490 100644
--- a/oox/source/core/filterdetect.cxx
+++ b/oox/source/core/filterdetect.cxx
@@ -179,7 +179,7 @@ void FilterDetectDocHandler::parseWorkbook(const AttributeList& rAttribs)
 
     // tdf#165180 Remember filter when opening file as 'Office Open XML Spreadsheet'
     // (fileVersion can only exist once, and lowestEdited can only be defined once - else corrupt)
-    // lowestEdited: 4 is 2007, 5 is 2010, 6 is 201?, 7 is 201?-2024
+    // lowestEdited: 4 is 2007, 5 is 2010, 6 is 2013 and 2016, 7 is 2019-2024
     const sal_Int32 nDefaultValue = rAttribs.getInteger(XML_lastEdited, 99);
     if (rAttribs.getInteger(XML_lowestEdited, nDefaultValue) > 4)
         maOOXMLVariant = OOXMLVariant::ISO_Transitional; // Excel 2010+
diff --git a/sc/inc/scextopt.hxx b/sc/inc/scextopt.hxx
index 1cc8b3f3bcd7..aa32557554bb 100644
--- a/sc/inc/scextopt.hxx
+++ b/sc/inc/scextopt.hxx
@@ -30,7 +30,10 @@ struct ScExtDocSettings
     double              mfTabBarWidth;      ///< Width of the tabbar, relative to frame window width (0.0 ... 1.0).
     sal_uInt32          mnLinkCnt;          ///< Recursive counter for loading external documents.
     SCTAB               mnDisplTab;         ///< Index of displayed sheet.
-    std::optional<sal_Int16> moLowestEdited; ///< Oldest Excel version that edited this document.
+    /** moLowestEdited:  oldest Excel version that edited this .XLSX - limit feature set to that.
+     *  4 is 2007, 5 is 2010, 6 is 2013 and 2016, 7 is 2019-2024+
+     */
+    std::optional<sal_Int16> moLowestEdited;
 
     explicit            ScExtDocSettings();
 };