diff --git a/NaturalSort/NaturalComparer.cs b/NaturalSort/NaturalComparer.cs
index 8f4f8101..c45feccd 100644
--- a/NaturalSort/NaturalComparer.cs
+++ b/NaturalSort/NaturalComparer.cs
@@ -14,6 +14,7 @@ using System.Collections.Generic;
 using System.Linq;
 using System.Text.RegularExpressions;
 
+// Ported to SabreTools.Matching. Remove once published.
 namespace NaturalSort
 {
     public class NaturalComparer : Comparer<string>, IDisposable
diff --git a/NaturalSort/NaturalComparerUtil.cs b/NaturalSort/NaturalComparerUtil.cs
index 6209d5e5..41f0612d 100644
--- a/NaturalSort/NaturalComparerUtil.cs
+++ b/NaturalSort/NaturalComparerUtil.cs
@@ -1,5 +1,6 @@
 using System.IO;
 
+// Ported to SabreTools.Matching. Remove once published.
 namespace NaturalSort
 {
     public static class NaturalComparerUtil
diff --git a/NaturalSort/NaturalReversedComparer.cs b/NaturalSort/NaturalReversedComparer.cs
index 0ffa8a19..adc0cbfd 100644
--- a/NaturalSort/NaturalReversedComparer.cs
+++ b/NaturalSort/NaturalReversedComparer.cs
@@ -14,6 +14,7 @@ using System.Collections.Generic;
 using System.Linq;
 using System.Text.RegularExpressions;
 
+// Ported to SabreTools.Matching. Remove once published.
 namespace NaturalSort
 {
     public class NaturalReversedComparer : Comparer<string>, IDisposable