diff --git a/MdePkg/Include/Protocol/DeviceIo.h b/MdePkg/Include/Protocol/DeviceIo.h
index f95e93e0b5..b16cb77a9c 100644
--- a/MdePkg/Include/Protocol/DeviceIo.h
+++ b/MdePkg/Include/Protocol/DeviceIo.h
@@ -41,8 +41,8 @@ typedef enum {
   IO_UINT32 = 2,
   IO_UINT64 = 3,
   //
-  // Below enumerations are added in "EFI 1.10 Specification update - 001", which
-  // is downloadable from http://download.intel.com/technology/efi/docs/EFI_1-10_Update.zip
+  // Below enumerations are added in "Extensible Firmware Interface Specification, 
+  // Version 1.10, Specification Update, Version 001".
   //
   MMIO_COPY_UINT8  = 4,
   MMIO_COPY_UINT16 = 5,