diff --git a/Objects/cellobject.c b/Objects/cellobject.c
index 74fa247..1a19c6a 100644
--- a/Objects/cellobject.c
+++ b/Objects/cellobject.c
@@ -53,9 +53,9 @@
 cell_repr(PyCellObject *op)
 {
 	if (op->ob_ref == NULL)
-		return PyString_FromFormat("<cell at %p: empty>", op);
+		return PyUnicode_FromFormat("<cell at %p: empty>", op);
 
-	return PyString_FromFormat("<cell at %p: %.80s object at %p>",
+	return PyUnicode_FromFormat("<cell at %p: %.80s object at %p>",
 				   op, op->ob_ref->ob_type->tp_name,
 				   op->ob_ref);
 }