+namespace detail {
+
+// Format support.
+template <class T, size_t M, class A, class B, class C>
+struct IndexableTraits<small_vector<T, M, A, B, C>>
+ : public IndexableTraitsSeq<small_vector<T, M, A, B, C>> {
+};
+
+} // namespace detail
+
+} // namespace folly