diff --git a/src/legacy/resolver.rs b/src/legacy/resolver.rs
index 6ede16c2..145dc4a1 100644
--- a/src/legacy/resolver.rs
+++ b/src/legacy/resolver.rs
@@ -119,11 +119,8 @@ where
 }
 
 pub fn typedef<TArg: Type, TResult: Type>(defs: &mut TypeMap) -> ProcedureDataType {
-    let mut type_map = TypeMap::default();
-    let arg_ty = TArg::reference(&mut type_map, &[]).inner;
-    let result_ty = TResult::reference(&mut type_map, &[]).inner;
+    let arg_ty = TArg::reference(defs, &[]).inner;
+    let result_ty = TResult::reference(defs, &[]).inner;
 
-    defs.append(&mut type_map);
-    
     ProcedureDataType { arg_ty, result_ty }
 }