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-rw-r--r--MdePkg/Include/x64/ProcessorBind.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/MdePkg/Include/x64/ProcessorBind.h b/MdePkg/Include/x64/ProcessorBind.h
index d8c76922c8..49cb117776 100644
--- a/MdePkg/Include/x64/ProcessorBind.h
+++ b/MdePkg/Include/x64/ProcessorBind.h
@@ -166,7 +166,7 @@ typedef INT64 INTN;
//
// The stack alignment required for X64
//
-#define CPU_STACK_ALIGNMENT sizeof(UINTN)
+#define CPU_STACK_ALIGNMENT 16
//
// Modifier to ensure that all protocol member functions and EFI intrinsics