diff --git a/MdePkg/MdePkg.dec b/MdePkg/MdePkg.dec
index e0a28d7997..c9912b968f 100644
--- a/MdePkg/MdePkg.dec
+++ b/MdePkg/MdePkg.dec
@@ -1613,6 +1613,30 @@
   # @ValidList  0x80000003 | 0x3040003
   gEfiMdePkgTokenSpaceGuid.PcdStatusCodeValueDxeDriverEnd|0x3040003|UINT32|0x30001014
 
+  ## This flag is used to control build time optimization based on debug print level.
+  #  BIT0  - Initialization message.<BR>
+  #  BIT1  - Warning message.<BR>
+  #  BIT2  - Load Event message.<BR>
+  #  BIT3  - File System message.<BR>
+  #  BIT4  - Allocate or Free Pool message.<BR>
+  #  BIT5  - Allocate or Free Page message.<BR>
+  #  BIT6  - Information message.<BR>
+  #  BIT7  - Dispatcher message.<BR>
+  #  BIT8  - Variable message.<BR>
+  #  BIT10 - Boot Manager message.<BR>
+  #  BIT12 - BlockIo Driver message.<BR>
+  #  BIT14 - Network Driver message.<BR>
+  #  BIT16 - UNDI Driver message.<BR>
+  #  BIT17 - LoadFile message.<BR>
+  #  BIT19 - Event message.<BR>
+  #  BIT20 - Global Coherency Database changes message.<BR>
+  #  BIT21 - Memory range cachability changes message.<BR>
+  #  BIT22 - Detailed debug message.<BR>
+  #  BIT28 - Error message.<BR>
+  # @Prompt Fixed Debug Message Print Level.
+  # @Expression  0x80000002 | (gEfiMdePkgTokenSpaceGuid.PcdFixedDebugPrintErrorLevel & 0x7F84AA00) == 0
+  gEfiMdePkgTokenSpaceGuid.PcdFixedDebugPrintErrorLevel|0x80000000|UINT32|0x30001016
+
 [PcdsFixedAtBuild,PcdsPatchableInModule]
   ## Indicates the maximum length of unicode string used in the following
   #  BaseLib functions: StrLen(), StrSize(), StrCmp(), StrnCmp(), StrCpy(), StrnCpy()<BR><BR>