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-rw-r--r--UefiCpuPkg/CpuDxe/CpuDxe.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/UefiCpuPkg/CpuDxe/CpuDxe.c b/UefiCpuPkg/CpuDxe/CpuDxe.c
index c755d8a289..34dfbf1e7e 100644
--- a/UefiCpuPkg/CpuDxe/CpuDxe.c
+++ b/UefiCpuPkg/CpuDxe/CpuDxe.c
@@ -1164,7 +1164,7 @@ InitInterruptDescriptorTable (
IntHandler =
(VOID*) (
OldIdt[Index].Bits.OffsetLow +
- (OldIdt[Index].Bits.OffsetHigh << 16)
+ (((UINTN) OldIdt[Index].Bits.OffsetHigh) << 16)
#if defined (MDE_CPU_X64)
+ (((UINTN) OldIdt[Index].Bits.OffsetUpper) << 32)
#endif