diff --git a/src/branches2.hpp b/src/branches2.hpp
index aea7b67b..4a0b243a 100644
--- a/src/branches2.hpp
+++ b/src/branches2.hpp
@@ -2,4 +2,6 @@
 
 #include <vector>
 
+typedef std::vector<Branch2> Branch2Vec;
 
+typedef std::vector<Branch2Vec> Branches2;