diff --git a/BizHawk.Client.EmuHawk/CustomControls/HexTextBox.cs b/BizHawk.Client.EmuHawk/CustomControls/HexTextBox.cs
index 743c895617..f55fd4aa6a 100644
--- a/BizHawk.Client.EmuHawk/CustomControls/HexTextBox.cs
+++ b/BizHawk.Client.EmuHawk/CustomControls/HexTextBox.cs
@@ -6,6 +6,7 @@ using BizHawk.Client.Common;
 
 namespace BizHawk.Client.EmuHawk
 {
+	// TODO: add a MaxValue property, nullable int, that will show up in Designer, change events will check that value and fix entries that exceed that value
 	public interface INumberBox
 	{
 		bool Nullable { get; }