diff --git a/MdePkg/ChangeLog.txt b/MdePkg/ChangeLog.txt
index ab276e8973..2f8af61313 100644
--- a/MdePkg/ChangeLog.txt
+++ b/MdePkg/ChangeLog.txt
@@ -326,7 +326,7 @@ Possible impacts:
 	This is a source level compatible change, but not binary level. We might need to rebuild some old binary modules to work with newer version of MdePkg.
 
 
-EDK_9815: Non-Compatible: qhuang8
+EDK_9817: Non-Compatible: qhuang8
 	Scrub EFI_ATA_IDENTIFY_DATA and EFI_ATAPI_IDENTIFY_DATA to strict follow newest ATA spec (ATA-8). This is a build non-backward compatible changes for ATA-related modules.
 	The ATA5_IDENTIFY_DATA in MdePkg\IndustryStandards\Atapi.h is exactly the same as the original ATA_IDENTIFY_DATA for backward compatibility support to follow ATA-5 spec.