1 files changed, 6 insertions, 7 deletions
diff --git a/DuetPkg/PciRootBridgeNoEnumerationDxe/PcatPciRootBridge.h b/DuetPkg/PciRootBridgeNoEnumerationDxe/PcatPciRootBridge.h
index f88932615e..960ad9a27f 100644
--- a/DuetPkg/PciRootBridgeNoEnumerationDxe/PcatPciRootBridge.h
+++ b/DuetPkg/PciRootBridgeNoEnumerationDxe/PcatPciRootBridge.h
@@ -96,17 +96,16 @@ typedef struct {
 #define DRIVER_INSTANCE_FROM_PCI_ROOT_BRIDGE_IO_THIS(a) \
   CR(a, PCAT_PCI_ROOT_BRIDGE_INSTANCE, Io, PCAT_PCI_ROOT_BRIDGE_SIGNATURE)
 
-#define VOLATILE volatile
 //
 // Private data types
 //
 typedef union {
-  UINT8   VOLATILE  *buf;
-  UINT8   VOLATILE  *ui8;
-  UINT16  VOLATILE  *ui16;
-  UINT32  VOLATILE  *ui32;
-  UINT64  VOLATILE  *ui64;
-  UINTN   VOLATILE  ui;
+  UINT8   volatile  *buf;
+  UINT8   volatile  *ui8;
+  UINT16  volatile  *ui16;
+  UINT32  volatile  *ui32;
+  UINT64  volatile  *ui64;
+  UINTN   volatile  ui;
 } PTR;
 
 typedef struct {