diff --git a/MdeModulePkg/MdeModulePkg.dec b/MdeModulePkg/MdeModulePkg.dec
index 30c3d9633b..e26ff142c8 100644
--- a/MdeModulePkg/MdeModulePkg.dec
+++ b/MdeModulePkg/MdeModulePkg.dec
@@ -255,7 +255,7 @@
 
   ## This PCD specifies whether the PCI bus driver probes non-standard, 
   #  such as 2K/1K/512, granularity for PCI to PCI bridge I/O window.
-  gEfiMdeModulePkgTokenSpaceGuid.PcdPciBridgeIoAlignmentProbe|FALSE|BOOLEAN|0x10000047
+  gEfiMdeModulePkgTokenSpaceGuid.PcdPciBridgeIoAlignmentProbe|FALSE|BOOLEAN|0x0001004e
   ## This PCD specifies whether StatusCode is reported via Serial port.
   gEfiMdeModulePkgTokenSpaceGuid.PcdStatusCodeUseSerial|TRUE|BOOLEAN|0x00010022