diff --git a/ChangeLog.d/session-cache-api.txt b/ChangeLog.d/session-cache-api.txt
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+API Changes
+    * The getter and setter API of the SSL session cache (used for
+      session-ID based session resumption) has changed to that of
+      a key-value store with keys being session IDs and values
+      being opaque instances of `mbedtls_ssl_session`.