diff --git a/MdeModulePkg/MdeModulePkg.dec b/MdeModulePkg/MdeModulePkg.dec
index 39793b878f..15d351d4ea 100644
--- a/MdeModulePkg/MdeModulePkg.dec
+++ b/MdeModulePkg/MdeModulePkg.dec
@@ -890,10 +890,6 @@
   # @Prompt Memory profile memory type.
   gEfiMdeModulePkgTokenSpaceGuid.PcdMemoryProfileMemoryType|0x0|UINT64|0x30001042
 
-  ## UART clock frequency is for the baud rate configuration.
-  # @Prompt Serial Port Clock Rate.
-  gEfiMdeModulePkgTokenSpaceGuid.PcdSerialClockRate|1843200|UINT32|0x00010066
-  
   ## PCI Serial Device Info. It is an array of Device, Function, and Power Management
   #  information that describes the path that contains zero or more PCI to PCI briges 
   #  followed by a PCI serial device.  Each array entry is 4-bytes in length.  The 
@@ -968,6 +964,10 @@
   gEfiMdeModulePkgTokenSpaceGuid.PcdSetupConOutRow|25|UINT32|0x4000000e
 
 [PcdsFixedAtBuild, PcdsPatchableInModule, PcdsDynamic, PcdsDynamicEx]
+  ## UART clock frequency is for the baud rate configuration.
+  # @Prompt Serial Port Clock Rate.
+  gEfiMdeModulePkgTokenSpaceGuid.PcdSerialClockRate|1843200|UINT32|0x00010066
+
   ## This PCD points to the front page formset GUID
   #  Compare the FormsetGuid or ClassGuid with this PCD value can detect whether in front page
   gEfiMdeModulePkgTokenSpaceGuid.PcdFrontPageFormSetGuid|{ 0xbc, 0x30, 0x0c, 0x9e,0x06, 0x3f, 0xa6, 0x4b, 0x82, 0x88, 0x9, 0x17, 0x9b, 0x85, 0x5d, 0xbe }|VOID*|0x0001006e