diff --git a/MdeModulePkg/MdeModulePkg.dec b/MdeModulePkg/MdeModulePkg.dec
index 83b09ec201..29aec9348b 100644
--- a/MdeModulePkg/MdeModulePkg.dec
+++ b/MdeModulePkg/MdeModulePkg.dec
@@ -455,6 +455,9 @@
   #  The default value in DxePhase is 128 KBytes.
   gEfiMdeModulePkgTokenSpaceGuid.PcdStatusCodeMemorySize|1|UINT16|0x00010054
 
+  ## This PCD specifies whether to reset system when memory type information changes.
+  gEfiMdeModulePkgTokenSpaceGuid.PcdResetOnMemoryTypeInformationChange|TRUE|BOOLEAN|0x00010056
+
 [PcdsPatchableInModule]
   ## Specify  memory size with page number for PEI code when 
   #  the feature of Loading Module at Fixed Address is enabled