diff --git a/app/src/main/java/eu/faircode/email/BoundaryCallbackMessages.java b/app/src/main/java/eu/faircode/email/BoundaryCallbackMessages.java
index ee7c6f2d4a..9b6b26b8eb 100644
--- a/app/src/main/java/eu/faircode/email/BoundaryCallbackMessages.java
+++ b/app/src/main/java/eu/faircode/email/BoundaryCallbackMessages.java
@@ -1059,6 +1059,7 @@ public class BoundaryCallbackMessages extends PagedList.BoundaryCallback<TupleMe
                 String search = query;
 
                 if (!utf8) {
+                    // Perhaps:  Transliterator.getInstance("de-ASCII");
                     search = search
                             .replace("ß", "ss") // Eszett
                             .replace("ij", "ij")