diff --git a/extlib/benz/codegen.c b/extlib/benz/codegen.c
index 84bd2d07..d4f2c187 100644
--- a/extlib/benz/codegen.c
+++ b/extlib/benz/codegen.c
@@ -782,15 +782,15 @@ index_local(codegen_context *cxt, pic_sym *sym)
 static int
 index_global(pic_state *pic, codegen_context *cxt, pic_sym *name)
 {
-  extern pic_value pic_vm_gref_slot(pic_state *, pic_sym *);
+  extern struct pic_box *pic_vm_gref_slot(pic_state *, pic_sym *);
   int pidx;
-  pic_value slot;
+  struct pic_box *slot;
 
   slot = pic_vm_gref_slot(pic, name);
 
   check_pool_size(pic, cxt);
   pidx = (int)cxt->plen++;
-  cxt->pool[pidx] = slot;
+  cxt->pool[pidx] = pic_obj_value(slot);
 
   return pidx;
 }