diff --git a/src/branches.cpp b/src/branches.cpp
index bd8b5a51..1cab114e 100644
--- a/src/branches.cpp
+++ b/src/branches.cpp
@@ -34,7 +34,7 @@
 #include <fnmatch.h>
 
 
-Branches::Impl::Impl(u64 default_minfreespace_)
+Branches::Impl::Impl(const u64 *default_minfreespace_)
   : _default_minfreespace(default_minfreespace_)
 {
 }