diff --git a/ChangeLog b/ChangeLog
index ee6c1f972..568fba146 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -49,6 +49,9 @@ Bugfix
    * Fix for key exchanges based on ECDH-RSA or ECDH-ECDSA which weren't
      enabled unless others were also present. Found by David Fernandez. #428
    * Fixed configuration of debug output in cert_app sample program.
+   * Fixed the sample applications gen_key.c, cert_req.c and cert_write.c for
+     builds where the configuration POLARSSL_PEM_WRITE_C is not defined. Found
+     by inestlerode. #559.
 
 = mbed TLS 1.3.17 branch 2016-06-28