Merge remote-tracking branch 'public/pr/1927' into development-restricted
diff --git a/ChangeLog b/ChangeLog
index 37cf750..820c26b 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,19 @@
mbed TLS ChangeLog (Sorted per branch, date)
+= mbed TLS 2.13.1 branch released 2018-09-06
+
+API Changes
+ * Extend the platform module with an abstraction mbedtls_platform_gmtime_r()
+ whose implementation should behave as a thread-safe version of gmtime().
+ This allows users to configure such an implementation at compile time when
+ the target system cannot be deduced automatically, by setting the option
+ MBEDTLS_PLATFORM_GMTIME_R_ALT. At this stage Mbed TLS is only able to
+ automatically select implementations for Windows and POSIX C libraries.
+
+Bugfix
+ * Fix build failures on platforms where only gmtime() is available but
+ neither gmtime_r() nor gmtime_s() are present. Fixes #1907.
+
= mbed TLS 2.13.0 branch released 2018-08-31
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