1 files changed, 6 insertions, 0 deletions
diff --git a/src/mask.h b/src/mask.h
index a7dea7cf..18f1893d 100644
--- a/src/mask.h
+++ b/src/mask.h
@@ -146,6 +146,12 @@ inline std::ostream& operator<<(std::ostream& out, const mask_t& mask) {
   return out;
 }
 
+inline void to_xml(std::ostream& out, const mask_t& mask)
+{
+  push_xml x(out, "mask");
+  out << x.guard(mask.expr.str());
+}
+
 } // namespace ledger
 
 #endif // _MASK_H