diff --git a/DuetPkg/PciRootBridgeNoEnumerationDxe/PcatPciRootBridge.h b/DuetPkg/PciRootBridgeNoEnumerationDxe/PcatPciRootBridge.h
index 50bd9b43b2..f88932615e 100644
--- a/DuetPkg/PciRootBridgeNoEnumerationDxe/PcatPciRootBridge.h
+++ b/DuetPkg/PciRootBridgeNoEnumerationDxe/PcatPciRootBridge.h
@@ -143,6 +143,14 @@ typedef struct {
   UINT32                    PpbMemoryWindow;     
 } PCAT_PCI_ROOT_BRIDGE_SCAN_FOR_ROM_CONTEXT;
 
+typedef struct {
+  UINT8 Register;
+  UINT8 Function;
+  UINT8 Device;
+  UINT8 Bus;
+  UINT8 Reserved[4];
+} DEFIO_PCI_ADDR;
+
 //
 // Driver Protocol Constructor Prototypes
 //
diff --git a/MdePkg/Include/IndustryStandard/Pci22.h b/MdePkg/Include/IndustryStandard/Pci22.h
index d596e926c2..8802b2b4bb 100644
--- a/MdePkg/Include/IndustryStandard/Pci22.h
+++ b/MdePkg/Include/IndustryStandard/Pci22.h
@@ -565,14 +565,6 @@ typedef struct {
 #define EFI_ROOT_BRIDGE_LIST                            'eprb'  
 #define EFI_PCI_EXPANSION_ROM_HEADER_EFISIGNATURE       0x0EF1  ///< defined in UEFI Spec.
 
-typedef struct {
-  UINT8 Register;
-  UINT8 Function;
-  UINT8 Device;
-  UINT8 Bus;
-  UINT8 Reserved[4];
-} DEFIO_PCI_ADDR;
-
 #define PCI_EXPANSION_ROM_HEADER_SIGNATURE              0xaa55
 #define PCI_DATA_STRUCTURE_SIGNATURE                    SIGNATURE_32 ('P', 'C', 'I', 'R')
 #define PCI_CODE_TYPE_PCAT_IMAGE                        0x00