diff --git a/src/branches.cpp b/src/branches.cpp
index 40b328fa..0d2ecce3 100644
--- a/src/branches.cpp
+++ b/src/branches.cpp
@@ -431,7 +431,7 @@ Branches::from_string(const std::string_view str_)
 
   impl = std::atomic_load(&_impl);
 
-  new_impl = std::make_shared<Branches::Impl>(impl->minfreespace());
+  new_impl = std::make_shared<Branches::Impl>(&minfreespace);
   *new_impl = *impl;
 
   rv = new_impl->from_string(str_);