diff --git a/src/fetch/collection_id.rs b/src/fetch/collection_id.rs
index 8c796f4..6aa9881 100644
--- a/src/fetch/collection_id.rs
+++ b/src/fetch/collection_id.rs
@@ -104,7 +104,7 @@ where
 }
 
 #[cfg(feature = "diesel")]
-const _IMPL_DIESEL_NEW_TYPE_FOR_COLLECTION_ID: () = {
+const _: () = {
     use diesel::{
         backend::Backend,
         deserialize::{FromSql, FromStaticSqlRow},
diff --git a/src/fetch/object_id.rs b/src/fetch/object_id.rs
index 108dc1a..0e01bbf 100644
--- a/src/fetch/object_id.rs
+++ b/src/fetch/object_id.rs
@@ -272,7 +272,7 @@ where
 }
 
 #[cfg(feature = "diesel")]
-const _IMPL_DIESEL_NEW_TYPE_FOR_OBJECT_ID: () = {
+const _: () = {
     use diesel::{
         backend::Backend,
         deserialize::{FromSql, FromStaticSqlRow},