diff --git a/crates/wit/src/parse_macro_input/item_fn.rs b/crates/wit/src/parse_macro_input/item_fn.rs
index 57b94d6..002e913 100644
--- a/crates/wit/src/parse_macro_input/item_fn.rs
+++ b/crates/wit/src/parse_macro_input/item_fn.rs
@@ -95,7 +95,7 @@ fn check_func(function_sig: &syn::Signature, function_vis: syn::Visibility) -> R
             "FCE export function shouldn't use template parameters",
         ));
     }
-    if let Some(_) = variadic {
+    if variadic.is_some() {
         return Err(Error::new(
             variadic.span(),
             "FCE export function shouldn't use variadic interface",
diff --git a/crates/wit/src/parse_macro_input/item_foreign_mod.rs b/crates/wit/src/parse_macro_input/item_foreign_mod.rs
index f8a8407..378cef0 100644
--- a/crates/wit/src/parse_macro_input/item_foreign_mod.rs
+++ b/crates/wit/src/parse_macro_input/item_foreign_mod.rs
@@ -29,7 +29,7 @@ const WASM_IMPORT_MODULE_DIRECTIVE_NAME: &str = "wasm_import_module";
 impl ParseMacroInput for syn::ItemForeignMod {
     fn parse_macro_input(self) -> Result<FCEAst> {
         match self.abi.name {
-            Some(ref name) if name.value() != "C".to_string() => {
+            Some(ref name) if name.value() != "C" => {
                 return Err(Error::new(self.span(), "only 'C' abi is allowed"))
             }
             _ => {}