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-rw-r--r--MdePkg/Include/IndustryStandard/Acpi10.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/MdePkg/Include/IndustryStandard/Acpi10.h b/MdePkg/Include/IndustryStandard/Acpi10.h
index c2f3acf..b463d6f 100644
--- a/MdePkg/Include/IndustryStandard/Acpi10.h
+++ b/MdePkg/Include/IndustryStandard/Acpi10.h
@@ -67,7 +67,7 @@ typedef struct {
/// The commond definition of QWORD, DWORD, and WORD
/// Address Space Descriptors
///
-typedef struct {
+typedef PACKED struct {
UINT8 Desc;
UINT16 Len;
UINT8 ResType;