diff --git a/Objects/abstract.c b/Objects/abstract.c
index fcd86caca97..abfaa5ecfd8 100644
--- a/Objects/abstract.c
+++ b/Objects/abstract.c
@@ -813,9 +813,10 @@ PyNumber_InPlaceAdd(PyObject *v, PyObject *w)
 					PyNumber_Add, 0) <= 0)
 			return x;
 	}
-	else if (HASINPLACE(v)
+	else if ((HASINPLACE(v)
 		  && ((v->ob_type->tp_as_sequence != NULL &&
-		      (f = v->ob_type->tp_as_sequence->sq_inplace_concat) != NULL))
+		       (f = v->ob_type->tp_as_sequence->sq_inplace_concat)
+		       != NULL)))
 		 || (v->ob_type->tp_as_number != NULL &&
 		     (f = v->ob_type->tp_as_number->nb_inplace_add) != NULL))
 		return (*f)(v, w);