1 files changed, 6 insertions, 3 deletions
diff --git a/MdePkg/Include/IndustryStandard/Mbr.h b/MdePkg/Include/IndustryStandard/Mbr.h
index 39120c7a21..8dd9d59f26 100644
--- a/MdePkg/Include/IndustryStandard/Mbr.h
+++ b/MdePkg/Include/IndustryStandard/Mbr.h
@@ -27,9 +27,10 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
 
 #define MBR_SIZE                    512
 
-///
-/// MBR Partition Entry
-///
+#pragma pack(1)
+//
+// MBR Partition Entry
+//
 typedef struct {
   UINT8 BootIndicator;
   UINT8 StartHead;
@@ -54,4 +55,6 @@ typedef struct {
   UINT16                Signature;
 } MASTER_BOOT_RECORD;
 
+#pragma pack()
+
 #endif