diff --git a/MdePkg/MdePkg.dec b/MdePkg/MdePkg.dec
index d36bd2eda3..8d5947fc9e 100644
--- a/MdePkg/MdePkg.dec
+++ b/MdePkg/MdePkg.dec
@@ -2259,6 +2259,9 @@
   # @Prompt Speculation Barrier Type.
   gEfiMdePkgTokenSpaceGuid.PcdSpeculationBarrierType|0x01|UINT8|0x30001018
 
+  ## This PCD specifies the interrupt vector for stack cookie check failures
+  gEfiMdePkgTokenSpaceGuid.PcdStackCookieExceptionVector|0x42|UINT8|0x30001019
+
 [PcdsFixedAtBuild,PcdsPatchableInModule]
   ## Indicates the maximum length of unicode string used in the following
   #  BaseLib functions: StrLen(), StrSize(), StrCmp(), StrnCmp(), StrCpy(), StrnCpy()<BR><BR>