1 files changed, 4 insertions, 2 deletions
diff --git a/src/wasm.h b/src/wasm.h
index c1b5b4bdf..c1936cb46 100644
--- a/src/wasm.h
+++ b/src/wasm.h
@@ -1331,14 +1331,16 @@ class RttCanon : public SpecificExpression<Expression::RttCanonId> {
 public:
   RttCanon(MixedArena& allocator) {}
 
-  void finalize() { WASM_UNREACHABLE("TODO (gc): rtt.canon"); }
+  void finalize();
 };
 
 class RttSub : public SpecificExpression<Expression::RttSubId> {
 public:
   RttSub(MixedArena& allocator) {}
 
-  void finalize() { WASM_UNREACHABLE("TODO (gc): rtt.sub"); }
+  Expression* parent;
+
+  void finalize();
 };
 
 class StructNew : public SpecificExpression<Expression::StructNewId> {