diff --git a/src/branch2.cpp b/src/branch2.cpp
index 89b60974..516eebaf 100644
--- a/src/branch2.cpp
+++ b/src/branch2.cpp
@@ -38,7 +38,8 @@ Branch2::Branch2(Branch2 &&v_)
   v_.fd = -1;
 }
 
-Branch2::Branch2(toml::value const &v_)
+Branch2::Branch2(toml::value const &v_,
+                 uint64_t const min_free_space_)
   : mode(Mode::RW)
 {
   enabled        = v_.at("enabled").as_boolean();