diff --git a/src/generator/codegen_register.rs b/src/generator/codegen_register.rs
index e9fa510..79aad52 100644
--- a/src/generator/codegen_register.rs
+++ b/src/generator/codegen_register.rs
@@ -349,10 +349,14 @@ fn generate_custom_values_const_enumdef(
         }
     });
     let variants = values.iter().map(|value| {
-        let desc = value.desc.clone().unwrap_or("".to_string());
+        let doc = match value.desc {
+            None => quote! {},
+            Some(ref s) if s.is_empty() => quote! {},
+            Some(ref desc) => quote! { #[doc = #desc] },
+        };
         let variant_name = util::parse_to_ident(&value.name.to_upper_camel_case()).unwrap();
         quote! {
-            #[doc = #desc]
+            #doc
             #variant_name
         }
     });