1 files changed, 1 insertions, 0 deletions
diff --git a/src/mir/mir.hpp b/src/mir/mir.hpp
index c01dcbd7..3215f9fc 100644
--- a/src/mir/mir.hpp
+++ b/src/mir/mir.hpp
@@ -155,6 +155,7 @@ TAGGED_UNION(RValue, Use,
     // Create a new instance of a struct (or enum)
     (Struct, struct {
         ::HIR::GenericPath  path;
+        unsigned int variant_idx;   // if ~0, it's a struct
         ::std::vector<LValue>   vals;
         })
 );