diff --git a/src/evalfunc.c b/src/evalfunc.c
index 5fccf52..85c64a2 100644
--- a/src/evalfunc.c
+++ b/src/evalfunc.c
@@ -4801,6 +4801,9 @@
 		    pt->pt_auto = arg_pt->pt_auto;
 		    if (pt->pt_dict != NULL)
 			++pt->pt_dict->dv_refcount;
+		    pt->pt_obj = arg_pt->pt_obj;
+		    if (pt->pt_obj != NULL)
+			++pt->pt_obj->obj_refcount;
 		}
 
 		pt->pt_refcount = 1;