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-rw-r--r--MdeModulePkg/Universal/Disk/PartitionDxe/Partition.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/MdeModulePkg/Universal/Disk/PartitionDxe/Partition.c b/MdeModulePkg/Universal/Disk/PartitionDxe/Partition.c
index 401facf475..41001fa2b2 100644
--- a/MdeModulePkg/Universal/Disk/PartitionDxe/Partition.c
+++ b/MdeModulePkg/Universal/Disk/PartitionDxe/Partition.c
@@ -602,7 +602,7 @@ PartitionInstallChildHandle (
Private->BlockIo.Revision = ParentBlockIo->Revision;
Private->BlockIo.Media = &Private->Media;
- CopyMem (Private->BlockIo.Media, ParentBlockIo->Media, SIZE_OF_EFI_BLOCK_IO_MEDIA_REV1);
+ CopyMem (Private->BlockIo.Media, ParentBlockIo->Media, sizeof (EFI_BLOCK_IO_MEDIA));
Private->Media.LogicalPartition = TRUE;
Private->Media.LastBlock = DivU64x32 (
MultU64x32 (