diff --git a/dll/shellext/shellbtrfs/shellbtrfs.spec b/dll/shellext/shellbtrfs/shellbtrfs.spec
index b16365d0c9f..38bd22fe9db 100644
--- a/dll/shellext/shellbtrfs/shellbtrfs.spec
+++ b/dll/shellext/shellbtrfs/shellbtrfs.spec
@@ -2,3 +2,22 @@
 @ stdcall -private DllGetClassObject(ptr ptr ptr)
 @ stdcall -private DllRegisterServer()
 @ stdcall -private DllUnregisterServer()
+@ stdcall -private DllInstall(long wstr)
+@ stdcall -private AddDeviceW(ptr ptr wstr long)
+@ stdcall -private RemoveDeviceW(ptr ptr wstr long)
+@ stdcall -private StartBalanceW(ptr ptr wstr long)
+@ stdcall -private PauseBalanceW(ptr ptr wstr long)
+@ stdcall -private StopBalanceW(ptr ptr wstr long)
+@ stdcall -private ShowScrubW(ptr ptr wstr long)
+@ stdcall -private ResetStatsW(ptr ptr wstr long)
+@ stdcall -private ShowPropSheetW(ptr ptr wstr long)
+@ stdcall -private RecvSubvolGUIW(ptr ptr wstr long)
+@ stdcall -private SendSubvolGUIW(ptr ptr wstr long)
+@ stdcall -private CreateSubvolW(ptr ptr wstr long)
+@ stdcall -private CreateSnapshotW(ptr ptr wstr long)
+@ stdcall -private ReflinkCopyW(ptr ptr wstr long)
+@ stdcall -private StartScrubW(ptr ptr wstr long)
+@ stdcall -private StopScrubW(ptr ptr wstr long)
+@ stdcall -private SendSubvolW(ptr ptr wstr long)
+@ stdcall -private RecvSubvolW(ptr ptr wstr long)
+@ stdcall -private ResizeDeviceW(ptr ptr wstr long)