diff --git a/PcAtChipsetPkg/KbcResetDxe/Reset.inf b/PcAtChipsetPkg/KbcResetDxe/Reset.inf
index 5bb39a43c6..6ca69ae3ea 100644
--- a/PcAtChipsetPkg/KbcResetDxe/Reset.inf
+++ b/PcAtChipsetPkg/KbcResetDxe/Reset.inf
@@ -45,6 +45,6 @@
   gEfiResetArchProtocolGuid
 
 [Depex]
-  gEfiCpuIoProtocolGuid
+  gEfiCpuIo2ProtocolGuid
 
 
diff --git a/PcAtChipsetPkg/PciHostBridgeDxe/PciHostBridge.h b/PcAtChipsetPkg/PciHostBridgeDxe/PciHostBridge.h
index 7cb6a6503f..105a3b0e04 100755
--- a/PcAtChipsetPkg/PciHostBridgeDxe/PciHostBridge.h
+++ b/PcAtChipsetPkg/PciHostBridgeDxe/PciHostBridge.h
@@ -22,7 +22,7 @@
 
 #include <Protocol/PciHostBridgeResourceAllocation.h>
 #include <Protocol/PciRootBridgeIo.h>
-#include <Protocol/CpuIo.h>
+#include <Protocol/CpuIo2.h>
 #include <Protocol/Metronome.h>
 #include <Protocol/DevicePath.h>
 
diff --git a/PcAtChipsetPkg/PciHostBridgeDxe/PciHostBridgeDxe.inf b/PcAtChipsetPkg/PciHostBridgeDxe/PciHostBridgeDxe.inf
index f36cf9b02a..282e65433f 100755
--- a/PcAtChipsetPkg/PciHostBridgeDxe/PciHostBridgeDxe.inf
+++ b/PcAtChipsetPkg/PciHostBridgeDxe/PciHostBridgeDxe.inf
@@ -47,9 +47,9 @@
 [Protocols]
   gEfiPciHostBridgeResourceAllocationProtocolGuid
   gEfiPciRootBridgeIoProtocolGuid
-  gEfiCpuIoProtocolGuid 
+  gEfiCpuIo2ProtocolGuid 
   gEfiMetronomeArchProtocolGuid
   gEfiDevicePathProtocolGuid
 
 [depex]
-  gEfiCpuIoProtocolGuid AND gEfiMetronomeArchProtocolGuid
+  gEfiCpuIo2ProtocolGuid AND gEfiMetronomeArchProtocolGuid
diff --git a/PcAtChipsetPkg/PciHostBridgeDxe/PciRootBridgeIo.c b/PcAtChipsetPkg/PciHostBridgeDxe/PciRootBridgeIo.c
index 11eadb40f7..36f83f62e0 100755
--- a/PcAtChipsetPkg/PciHostBridgeDxe/PciRootBridgeIo.c
+++ b/PcAtChipsetPkg/PciHostBridgeDxe/PciRootBridgeIo.c
@@ -211,7 +211,7 @@ RootBridgeIoPciRW (
 // Memory Controller Pci Root Bridge Io Module Variables
 //
 EFI_METRONOME_ARCH_PROTOCOL *mMetronome;
-EFI_CPU_IO_PROTOCOL *mCpuIo;
+EFI_CPU_IO2_PROTOCOL *mCpuIo;
 
 EFI_STATUS
 RootBridgeConstructor (
@@ -313,7 +313,7 @@ Returns:
 
   Protocol->SegmentNumber  = 0;
 
-  Status = gBS->LocateProtocol (&gEfiCpuIoProtocolGuid, NULL, (VOID **)&mCpuIo);
+  Status = gBS->LocateProtocol (&gEfiCpuIo2ProtocolGuid, NULL, (VOID **)&mCpuIo);
   ASSERT_EFI_ERROR (Status);
 
   Status = gBS->LocateProtocol (&gEfiMetronomeArchProtocolGuid, NULL, (VOID **)&mMetronome);