1 files changed, 1 insertions, 0 deletions

diff --git a/bpkg/types b/bpkg/types
index a5fe114..648c0f1 100644
--- a/bpkg/types
+++ b/bpkg/types
@@ -25,6 +25,7 @@ namespace bpkg
   using std::shared_ptr;
 
   using butl::optional;
+  using butl::nullopt;
 
   // <butl/path>
   //