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-rw-r--r--OvmfPkg/PlatformPei/Platform.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/OvmfPkg/PlatformPei/Platform.c b/OvmfPkg/PlatformPei/Platform.c
index d91f113693..589c5c3804 100644
--- a/OvmfPkg/PlatformPei/Platform.c
+++ b/OvmfPkg/PlatformPei/Platform.c
@@ -230,7 +230,7 @@ MiscInitialization (
//
// Set the PM I/O base address to 0x400
//
- PciAndThenOr32 (PCI_LIB_ADDRESS (0, 1, 3, 0x40), (UINT32) ~0xfc0, 0x400);
+ PciAndThenOr32 (PCI_LIB_ADDRESS (0, 1, 3, 0x40), (UINT32) ~0xFFC0, 0x400);
}
}