diff --git a/ChangeLog.d/bugfix_PR_2632.txt b/ChangeLog.d/bugfix_PR_2632.txt
new file mode 100644
index 0000000..1d54b4d
--- /dev/null
+++ b/ChangeLog.d/bugfix_PR_2632.txt
@@ -0,0 +1,4 @@
+Bugfix
+   * Avoid use of statically sized stack buffers for certificate writing.
+     This previously limited the maximum size of DER encoded certificates
+     in mbedtls_x509write_crt_der() to 2Kb. Reported by soccerGB in #2631.