diff --git a/implementations/rust/preserves-schema/src/compiler/parsers.rs b/implementations/rust/preserves-schema/src/compiler/parsers.rs
index e604bad..b57fbee 100644
--- a/implementations/rust/preserves-schema/src/compiler/parsers.rs
+++ b/implementations/rust/preserves-schema/src/compiler/parsers.rs
@@ -73,7 +73,7 @@ pub fn gen_definition_parser(m: &mut ModuleContext, n: &str, d: &Definition) {
                       " _support::Parse", anglebrackets![ctxt.m.any_type()], " for ",
                       names::render_constructor(n), ty.generic_arg(ctxt.m), " ",
                       codeblock![
-                          "type Language = crate::gen::Language<_Value>;",
+                          seq!["type Language = ", ctxt.m.language_type(), ";"],
                           seq!["fn parse<'a, _LL: Into<&'a Self::Language>>",
                                "(_ctxt: _LL, value: &", ctxt.m.any_type(), ") ",
                                " -> std::result::Result<Self, _support::ParseError>",
diff --git a/implementations/rust/preserves-schema/src/compiler/unparsers.rs b/implementations/rust/preserves-schema/src/compiler/unparsers.rs
index e35201f..02c1deb 100644
--- a/implementations/rust/preserves-schema/src/compiler/unparsers.rs
+++ b/implementations/rust/preserves-schema/src/compiler/unparsers.rs
@@ -101,7 +101,7 @@ pub fn gen_definition_unparser(m: &mut ModuleContext, n: &str, d: &Definition) {
                       " _support::Unparse", anglebrackets![ctxt.m.any_type()], " for ",
                       names::render_constructor(n), ty.generic_arg(ctxt.m), " ",
                       codeblock![
-                          "type Language = crate::gen::Language<_Value>;",
+                          seq!["type Language = ", ctxt.m.language_type(), ";"],
                           seq!["fn unparse<'a, _LL: Into<&'a Self::Language>>",
                                "(&self, _ctxt: _LL) -> ", ctxt.m.any_type(),
                                " where ", ctxt.m.language_type(), ": 'a ",