diff --git a/app/src/main/java/com/vitorpamplona/amethyst/service/Nip05Verifier.kt b/app/src/main/java/com/vitorpamplona/amethyst/service/Nip05Verifier.kt
index 8eb63b2d8..8ebc3789f 100644
--- a/app/src/main/java/com/vitorpamplona/amethyst/service/Nip05Verifier.kt
+++ b/app/src/main/java/com/vitorpamplona/amethyst/service/Nip05Verifier.kt
@@ -75,6 +75,9 @@ class Nip05Verifier() {
         fetchNip05Json(
             nip05,
             onSuccess = {
+                // NIP05 usernames are case insensitive, but JSON properties are not
+                // converts the json to lowercase and then tries to access the username via a
+                // lowercase version of the username.
                 val nip05url = try {
                     mapper.readTree(it.lowercase())
                 } catch (t: Throwable) {