diff --git a/src/printer.rs b/src/printer.rs
index 043eabc..311a826 100644
--- a/src/printer.rs
+++ b/src/printer.rs
@@ -75,12 +75,6 @@ impl<Context: PrintContext> Printer<Context> for String {
     }
 }
 
-pub struct UnitPrinter;
-
-impl<Context> Printer<Context> for UnitPrinter {
-    fn print(&self, _ctx: &mut Context) {}
-}
-
 pub struct IndentPrinter;
 
 impl<C: IndentContext + PrintContext> Printer<C> for IndentPrinter {
@@ -136,14 +130,6 @@ impl<Context> TreePrinter<Context> {
     }
 }
 
-pub struct TreePrinterPrinter<Context>(TreePrinter<Context>);
-
-impl<Context> Printer<Context> for TreePrinterPrinter<Context> {
-    fn print(&self, ctx: &mut Context) {
-        self.0.print(ctx)
-    }
-}
-
 impl<Context, P> Add<Option<P>> for TreePrinter<Context>
 where
     TreePrinter<Context>: Add<P, Output = TreePrinter<Context>>,
diff --git a/src/rust/client_gen.rs b/src/rust/client_gen.rs
index 236468f..8ee300d 100644
--- a/src/rust/client_gen.rs
+++ b/src/rust/client_gen.rs
@@ -493,11 +493,10 @@ fn response_type(response: &ReferenceOr<Response>, ref_cache: &mut RefCache) ->
             "Reference in response top level: {reference}"
         ))),
         ReferenceOr::Item(resp) => {
-            if resp.content.len() != 1 {
-                Err(Error::unimplemented(
-                    "Response content with not exactly 1 option.",
-                ))
-            } else {
+            if resp.content.is_empty() {
+                // No content case
+                Ok(DataType::Unit)
+            } else if resp.content.len() == 1 {
                 let (content_type, media_type) = resp.content.first().unwrap();
 
                 if content_type.starts_with("application/json") {
@@ -520,6 +519,10 @@ fn response_type(response: &ReferenceOr<Response>, ref_cache: &mut RefCache) ->
                         "Response content type: {content_type}"
                     )))
                 }
+            } else {
+                Err(Error::unimplemented(
+                    "Response content with not exactly 1 option.",
+                ))
             }
         }
     }
@@ -748,6 +751,7 @@ fn render_path_param(method: &Method, name: &str) -> RustResult {
             DataType::String => Ok(unit() + &param.name),
             DataType::Uuid => Ok(unit() + "&" + &param.name + ".to_string()"),
             DataType::Model(_) => Ok(unit() + "&" + &param.name + ".to_string()"),
+            DataType::Int(_) => Ok(unit() + "&" + &param.name + ".to_string()"),
             _ => Err(Error::unexpected(format!(
                 "Unexpected param type {name}: {:?}",
                 param.tpe
@@ -882,6 +886,7 @@ fn status_match(range_results: bool, code: &StatusCode) -> RustPrinter {
 fn response_body_parsing(data_type: &DataType) -> RustPrinter {
     match data_type {
         DataType::Binary => unit() + "response.bytes().await?",
+        DataType::Unit => unit() + "()",
         _ => unit() + "response.json::<" + data_type.render_declaration(false) + ">().await?",
     }
 }
diff --git a/src/rust/model_gen.rs b/src/rust/model_gen.rs
index 05f65cc..8b05a87 100644
--- a/src/rust/model_gen.rs
+++ b/src/rust/model_gen.rs
@@ -342,20 +342,7 @@ pub fn multipart_field_module() -> Result<Module> {
                 + line("fn to_multipart_field(&self) -> String;")
                 + line("fn mime_type(&self) -> &'static str;"),
         )
-        + line(unit() + "}")
-        + NewLine
-        + line(unit() + "impl<T: std::fmt::Display> MultipartField for T {")
-        + indented(
-            unit()
-                + line("fn to_multipart_field(&self) -> String {")
-                + indented(line("self.to_string()"))
-                + line("}")
-                + NewLine
-                + line(unit() + "fn mime_type(&self) -> &'static str {")
-                + indented(line(r#""text/plain; charset=utf-8""#))
-                + line(unit() + "}"),
-        )
-        + line("}");
+        + line(unit() + "}");
 
     Ok(Module {
         def: ModuleDef {
diff --git a/src/rust/types.rs b/src/rust/types.rs
index d0d0c8a..53a506f 100644
--- a/src/rust/types.rs
+++ b/src/rust/types.rs
@@ -74,6 +74,7 @@ pub enum DataType {
     MapOf(Box<DataType>),
     Json,
     Yaml,
+    Unit,
 }
 
 pub fn escape_keywords(name: &str) -> String {
@@ -95,6 +96,7 @@ impl DataType {
         }
 
         match self {
+            DataType::Unit => unit() + "()",
             DataType::String => {
                 if top_param {
                     unit() + "&str"