diff --git a/changelogs/internal/newsfragments/1800.clarification b/changelogs/internal/newsfragments/1800.clarification
new file mode 100644
index 00000000..7dfac999
--- /dev/null
+++ b/changelogs/internal/newsfragments/1800.clarification
@@ -0,0 +1 @@
+Use reference to `OneTimeKeys` schema in OpenAPI definitions.