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-rw-r--r--OvmfPkg/Library/AcpiTimerLib/AcpiTimerLib.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/OvmfPkg/Library/AcpiTimerLib/AcpiTimerLib.c b/OvmfPkg/Library/AcpiTimerLib/AcpiTimerLib.c
index 027912e0f..8f4a5b3d1 100644
--- a/OvmfPkg/Library/AcpiTimerLib/AcpiTimerLib.c
+++ b/OvmfPkg/Library/AcpiTimerLib/AcpiTimerLib.c
@@ -60,7 +60,7 @@ AcpiTimerLibConstructor (
mPmba = PcdGet16 (PcdAcpiPmBaseAddress);
PciAndThenOr32 (PCI_LIB_ADDRESS (0,Device,3,0x40),
- (UINT32) ~0xfc0, mPmba);
+ (UINT32) ~0xFFC0, mPmba);
PciOr8 (PCI_LIB_ADDRESS (0,Device,3,0x04), 0x01);
}