Add credit to Changelog for #562
diff --git a/ChangeLog b/ChangeLog
index 351275b..2d26a4f 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -8,7 +8,7 @@
      Found by omlib-lin. #673
    * Fix unused variable/function compilation warnings in pem.c, x509_crt.c and
      x509_csr.c that are reported when building mbed TLS with a config.h that
-     does not define MBEDTLS_PEM_PARSE_C. #562
+     does not define MBEDTLS_PEM_PARSE_C. Found by omnium21. #562
 
 = mbed TLS 2.4.1 branch released 2016-12-13