diff --git a/src/runtime/c/pgf/linearizer.h b/src/runtime/c/pgf/linearizer.h
index 65c02c48b..e483824b0 100644
--- a/src/runtime/c/pgf/linearizer.h
+++ b/src/runtime/c/pgf/linearizer.h
@@ -59,7 +59,8 @@ struct PgfLinFuncs
 };
 
 
-
+PgfCncTree
+pgf_lzr_wrap_linref(PgfCncTree ctree, GuPool* pool);
 
 /// Linearize a concrete syntax tree.
 void
diff --git a/src/runtime/python/pypgf.c b/src/runtime/python/pypgf.c
index d5d3e78b1..21db6741a 100644
--- a/src/runtime/python/pypgf.c
+++ b/src/runtime/python/pypgf.c
@@ -1492,6 +1492,8 @@ Concr_bracketedLinearize(ConcrObject* self, PyObject *args)
 	
 	PyObject* list = PyList_New(0);
 
+	ctree = pgf_lzr_wrap_linref(ctree, tmp_pool);
+
 	PgfBracketLznState state;
 	state.funcs = &pgf_bracket_lin_funcs;
 	state.stack = gu_new_buf(PyObject*, tmp_pool);
@@ -1499,18 +1501,8 @@ Concr_bracketedLinearize(ConcrObject* self, PyObject *args)
 	pgf_lzr_linearize(self->concr, ctree, 0, &state.funcs);
 
 	gu_pool_free(tmp_pool);
-	
-	PyObject* bracket = NULL;
-	if (PyList_Size(list) == 1) {
-		bracket = PyList_GetItem(list, 0);
-		Py_INCREF(bracket);
-	} else {
-		PyErr_SetString(PGFError, "The abstract tree cannot be linearized");
-	}
 
-	Py_DECREF(list);
-
-	return bracket;
+	return list;
 }
 
 static PyObject*