diff --git a/base/tuple.h b/base/tuple.h
index 41c6a00..88c3075 100644
--- a/base/tuple.h
+++ b/base/tuple.h
@@ -81,6 +81,12 @@
 template <> struct MakeIndexSequenceImpl<11> {
   using Type = IndexSequence<0,1,2,3,4,5,6,7,8,9,10>;
 };
+template <> struct MakeIndexSequenceImpl<12> {
+  using Type = IndexSequence<0,1,2,3,4,5,6,7,8,9,10,11>;
+};
+template <> struct MakeIndexSequenceImpl<13> {
+  using Type = IndexSequence<0,1,2,3,4,5,6,7,8,9,10,11,12>;
+};
 
 #else  // defined(WIN) && defined(_PREFAST_)