diff --git a/changelogs/appendices/newsfragments/2398.clarification b/changelogs/appendices/newsfragments/2398.clarification
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+Add specification of URL-safe unpadded Base64.
diff --git a/changelogs/client_server/newsfragments/2398.clarification b/changelogs/client_server/newsfragments/2398.clarification
new file mode 100644
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+++ b/changelogs/client_server/newsfragments/2398.clarification
@@ -0,0 +1 @@
+Clarify definitions of `EncryptedFile` structure.