diff --git a/drivers/filesystems/btrfs/btrfs_drv.h b/drivers/filesystems/btrfs/btrfs_drv.h
index d8397367515..3af0170e6c9 100644
--- a/drivers/filesystems/btrfs/btrfs_drv.h
+++ b/drivers/filesystems/btrfs/btrfs_drv.h
@@ -144,11 +144,9 @@
 #define FILE_DEVICE_ALLOW_APPCONTAINER_TRAVERSAL 0x00020000
 #endif
 
-#ifndef _MSC_VER
 typedef struct _FILE_ID_128 {
     UCHAR Identifier[16];
 } FILE_ID_128, *PFILE_ID_128;
-#endif
 
 typedef struct _DUPLICATE_EXTENTS_DATA {
     HANDLE FileHandle;
@@ -1820,6 +1818,7 @@ typedef struct _PEB {
     PVOID Reserved7[1];
     ULONG SessionId;
 } PEB,*PPEB;
+#endif
 
 #ifdef _MSC_VER
 __kernel_entry
@@ -1831,4 +1830,3 @@ NTSTATUS NTAPI ZwQueryInformationProcess(
     OUT PULONG ReturnLength OPTIONAL
 );
 #endif
-#endif