diff --git a/ChangeLog.d/public_fields.txt b/ChangeLog.d/public_fields.txt
new file mode 100644
index 0000000000..ca0706f07d
--- /dev/null
+++ b/ChangeLog.d/public_fields.txt
@@ -0,0 +1,5 @@
+API changes
+   * Declare a number of structure fields as public: the fields of
+     mbedtls_ecp_curve_info, the fields describing the result of ASN.1 and
+     X.509 parsing, and finally the field fd of mbedtls_net_context on
+     POSIX/Unix-like platforms.