diff --git a/ChangeLog b/ChangeLog
index 80c9c09..83fd5ac 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -14,7 +14,7 @@
      that are reported when building mbed TLS with a config.h that does not
      define POLARSSL_PEM_PARSE_C. Found by omnium21. #562
    * Fixed multiple buffer overreads in mbedtls_pem_read_buffer() when parsing
-     the input string in pem format to extract the different components. Found
+     the input string in PEM format to extract the different components. Found
      by Eyal Itkin.
 
 = mbed TLS 1.3.18 branch 2016-10-17