diff --git a/programs/other/pipet/Tupfile.lua b/programs/other/pipet/Tupfile.lua
index 71502727e..1a713205e 100644
--- a/programs/other/pipet/Tupfile.lua
+++ b/programs/other/pipet/Tupfile.lua
@@ -1,2 +1,4 @@
 if tup.getconfig("NO_FASM") ~= "" then return end
+HELPERDIR = (tup.getconfig("HELPERDIR") == "") and "../../.." or tup.getconfig("HELPERDIR")
+tup.include(HELPERDIR .. "/use_fasm.lua")
 tup.rule("pipet.asm", FASM .. " -dlang=" .. tup.getconfig("LANG") .. " %f %o" .. tup.getconfig("KPACK_CMD"), "%B")