diff --git a/reactos/drivers/filesystems/ntfs/finfo.c b/reactos/drivers/filesystems/ntfs/finfo.c
index 8ebff44b3ed..1ebc5d98b8d 100644
--- a/reactos/drivers/filesystems/ntfs/finfo.c
+++ b/reactos/drivers/filesystems/ntfs/finfo.c
@@ -209,8 +209,8 @@ NtfsGetNetworkOpenInformation(PNTFS_FCB Fcb,
     NetworkInfo->LastWriteTime.QuadPart = FileName->LastWriteTime;
     NetworkInfo->ChangeTime.QuadPart = FileName->ChangeTime;
 
-    NetworkInfo->EndOfFile.QuadPart = FileName->AllocatedSize;
-    NetworkInfo->AllocationSize.QuadPart = ROUND_UP(FileName->AllocatedSize, DeviceExt->NtfsInfo.BytesPerCluster);
+    NetworkInfo->EndOfFile.QuadPart = Fcb->RFCB.FileSize;
+    NetworkInfo->AllocationSize.QuadPart = Fcb->RFCB.AllocationSize;
 
     NtfsFileFlagsToAttributes(FileName->FileAttributes, &NetworkInfo->FileAttributes);