diff --git a/commit-reach.c b/commit-reach.c
index 5a845440a9..7e422b0cd3 100644
--- a/commit-reach.c
+++ b/commit-reach.c
@@ -628,8 +628,12 @@ int can_all_from_reach_with_flag(struct object_array *from,
 	}
 	free(list);
 
-	for (i = 0; i < from->nr; i++)
-		from->objects[i].item->flags &= ~assign_flag;
+	for (i = 0; i < from->nr; i++) {
+		struct object *from_one = from->objects[i].item;
+
+		if (from_one)
+			from_one->flags &= ~assign_flag;
+	}
 
 	return result;
 }