diff --git a/ChangeLog.d/rsa-private-perf.txt b/ChangeLog.d/rsa-private-perf.txt
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+++ b/ChangeLog.d/rsa-private-perf.txt
@@ -0,0 +1,4 @@
+Bugfix
+   * Partially fix a performance regression in RSA operations introduced by a
+     security fix in 3.6.5, by improving the performance of RSA private key
+     operations when MBEDTLS_RSA_NO_CRT is disabled, which is the default.