diff --git a/MdePkg/ChangeLog.txt b/MdePkg/ChangeLog.txt
index 6a00b54213..d1a1db5ee7 100644
--- a/MdePkg/ChangeLog.txt
+++ b/MdePkg/ChangeLog.txt
@@ -235,4 +235,12 @@ EDK_6565:  Non-Compatible: qhuang8
 Possible Impacts:
 	Modules depending on UefiScsiLib for these macros should update the source to use new UefiLib macros
 	EFI_TIMER_PERIOD_MICROSECONDS(X), EFI_TIMER_PERIOD_MILLISECONDS(X) and EFI_TIMER_PERIOD_SECONDS(X) for managing Timer Events.
-	Especailly, EFI_SCSI_STALL_SECONDS(a) is simply replaced by EFI_TIMER_PERIOD_SECONDS(a)
\ No newline at end of file
+	Especailly, EFI_SCSI_STALL_SECONDS(a) is simply replaced by EFI_TIMER_PERIOD_SECONDS(a)
+
+EDK_6857:  Non-Compatible: qwang12
+	
+	Rename PCD name of PcdDefaultTerminalType to PcdUartDefaultTerminalType based on Mde 
+
+Possible Impacts:
+	All DSC files that reference PcdDefaultTerminalType.
+