diff --git a/implementations/rust/preserves-schema/src/compiler/mod.rs b/implementations/rust/preserves-schema/src/compiler/mod.rs
index ab4d8a3..a777683 100644
--- a/implementations/rust/preserves-schema/src/compiler/mod.rs
+++ b/implementations/rust/preserves-schema/src/compiler/mod.rs
@@ -102,7 +102,7 @@ pub fn compile(config: &CompilerConfig) -> Result<(), std::io::Error> {
 
         m.define_type(item(seq!["pub type _Ptr = ", match &v.embedded_type {
             EmbeddedTypeName::False => item("preserves::value::IOValue".to_owned()),
-            EmbeddedTypeName::Ref(r) => m.render_ref(&**r),
+            EmbeddedTypeName::Ref(r) => item(seq!["std::sync::Arc", anglebrackets![m.render_ref(&**r)]]),
         }, ";"]));
         m.define_type(item(seq!["pub type _Any = preserves::value::ArcValue<_Ptr>;"]));
 
diff --git a/implementations/rust/preserves-schema/src/compiler/unparsers.rs b/implementations/rust/preserves-schema/src/compiler/unparsers.rs
index f2839d1..278d6ba 100644
--- a/implementations/rust/preserves-schema/src/compiler/unparsers.rs
+++ b/implementations/rust/preserves-schema/src/compiler/unparsers.rs
@@ -133,7 +133,7 @@ fn simple_pattern_unparser(
             }
         }
         SimplePattern::Embedded { .. } =>
-            item(seq!["preserves::value::Value::Domain(", src.as_ref().unwrap().to_owned(), ").wrap()"]),
+            item(seq!["preserves::value::Value::Domain(", src.as_ref().unwrap().to_owned(), ".clone()).wrap()"]),
         SimplePattern::Lit { value } =>
             item(seq![parens![ctxt.m.define_literal(value)], ".clone()"]),
         SimplePattern::Seqof { pattern } => {