diff --git a/changelogs/server_server/newsfragments/1818.clarification b/changelogs/server_server/newsfragments/1818.clarification
new file mode 100644
index 00000000..8c50b6ac
--- /dev/null
+++ b/changelogs/server_server/newsfragments/1818.clarification
@@ -0,0 +1 @@
+Clarify that whitespace around commas is allowed in the `X-Matrix` `Authorization` header value params list.
\ No newline at end of file