diff --git a/src/generator/codegen_register.rs b/src/generator/codegen_register.rs
index b888689..7969edd 100644
--- a/src/generator/codegen_register.rs
+++ b/src/generator/codegen_register.rs
@@ -359,7 +359,7 @@ fn generate_custom_values_const_enumdef(
             Some(ref s) if s.is_empty() => quote! {},
             Some(ref desc) => {
                 let desc = util::escape_brackets_with_numbers(desc);
-                quote! { #![doc = #desc] }
+                quote! { #[doc = #desc] }
             }
         };
         let variant_name = util::parse_to_ident(&value.name.to_upper_camel_case()).unwrap();