diff --git a/reactos/drivers/filesystems/btrfs/balance.c b/reactos/drivers/filesystems/btrfs/balance.c
index c961fc47d34..cf9717480da 100644
--- a/reactos/drivers/filesystems/btrfs/balance.c
+++ b/reactos/drivers/filesystems/btrfs/balance.c
@@ -67,9 +67,11 @@ typedef struct {
     LIST_ENTRY list_entry;
 } data_reloc_ref;
 
+#ifndef __REACTOS__
 #ifndef _MSC_VER // not in mingw yet
 #define DEVICE_DSM_FLAG_TRIM_NOT_FS_ALLOCATED 0x80000000
 #endif
+#endif
 
 #define BALANCE_UNIT 0x100000 // only read 1 MB at a time
 
diff --git a/reactos/sdk/include/psdk/ntddstor.h b/reactos/sdk/include/psdk/ntddstor.h
index 900f539a002..2a5c64d1b7c 100644
--- a/reactos/sdk/include/psdk/ntddstor.h
+++ b/reactos/sdk/include/psdk/ntddstor.h
@@ -566,6 +566,8 @@ typedef struct _DEVICE_TRIM_DESCRIPTOR {
 
 typedef ULONG DEVICE_DATA_MANAGEMENT_SET_ACTION;
 
+#define DEVICE_DSM_FLAG_TRIM_NOT_FS_ALLOCATED 0x80000000
+
 typedef struct _DEVICE_DATA_SET_RANGE {
   LONGLONG StartingOffset;
   ULONGLONG LengthInBytes;