diff --git a/MdeModulePkg/MdeModulePkg.dec b/MdeModulePkg/MdeModulePkg.dec
index 5abd9b8aa2..b63464b40d 100644
--- a/MdeModulePkg/MdeModulePkg.dec
+++ b/MdeModulePkg/MdeModulePkg.dec
@@ -305,7 +305,10 @@
     
   ## Size of the FTW working block range.
   gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageFtwWorkingSize|0x0|UINT32|0x30000011
- 
+
+  ## FFS filename to find the ACPI tables
+  gEfiMdeModulePkgTokenSpaceGuid.PcdAcpiTableStorageFile|{ 0x25, 0x4e, 0x37, 0x7e, 0x01, 0x8e, 0xee, 0x4f, 0x87, 0xf2, 0x39, 0xc, 0x23, 0xc6, 0x6, 0xcd }|VOID*|16
+
 [PcdsFixedAtBuild,PcdsPatchableInModule]
   ## Maximun number of performance log entries during PEI phase.
   gEfiMdeModulePkgTokenSpaceGuid.PcdMaxPeiPerformanceLogEntries|40|UINT8|0x0001002f