diff --git a/includes/core-changes/windowsforms/3.1/remove-controls-3.1.md b/includes/core-changes/windowsforms/3.1/remove-controls-3.1.md
index 9968e8d2b22db..205e11308710e 100644
--- a/includes/core-changes/windowsforms/3.1/remove-controls-3.1.md
+++ b/includes/core-changes/windowsforms/3.1/remove-controls-3.1.md
@@ -14,6 +14,7 @@ The following types are no longer available:
 - <xref:System.Windows.Forms.DataGridBoolColumn>
 - <xref:System.Windows.Forms.DataGridCell>
 - <xref:System.Windows.Forms.DataGridColumnStyle>
+- <xref:System.Windows.Forms.DataGridColumnStyle.DataGridColumnHeaderAccessibleObject>
 - <xref:System.Windows.Forms.DataGridLineStyle>
 - <xref:System.Windows.Forms.DataGridParentRowsLabelStyle>
 - <xref:System.Windows.Forms.DataGridPreferredColumnWidthTypeConverter>