diff --git a/core_compiler.cpp b/core_compiler.cpp
index 51a6977..7097d05 100644
--- a/core_compiler.cpp
+++ b/core_compiler.cpp
@@ -83,9 +83,9 @@ parse_init(Parse_Ctx *ctx, Arena *perm_allocator, Allocator *heap_allocator){
   pctx               = ctx;
   ctx->perm          = perm_allocator;
   ctx->heap          = heap_allocator;
-  ctx->gen           = {ctx->heap};
   ctx->type_map      = {ctx->heap};
-  ctx->helper_builder= {ctx->heap};
+  ctx->gen           = {ctx->perm};
+  ctx->helper_builder= {ctx->perm};
   ctx->scope_ids = 1;
   bigint_allocator   = ctx->perm;
   arena_init(&ctx->stage_arena, "Compiler stage arena"_s);