diff --git a/fang/src/asynk/backend_sqlx.rs b/fang/src/asynk/backend_sqlx.rs
index 8f9079f..144e871 100644
--- a/fang/src/asynk/backend_sqlx.rs
+++ b/fang/src/asynk/backend_sqlx.rs
@@ -38,6 +38,10 @@ pub(crate) enum BackendSqlX {
 
     #[cfg(feature = "asynk-mysql")]
     MySql,
+
+    #[cfg(not(any(feature = "asynk-postgres", feature = "asynk-sqlite", feature = "asynk-mysql")))]
+    #[allow(dead_code)]
+    Dummy,
 }
 
 #[allow(dead_code)]
@@ -105,6 +109,8 @@ impl BackendSqlX {
             BackendSqlX::MySql => {
                 BackendSqlXMySQL::execute_query(_query, _pool.unwrap_mysql_pool(), _params).await
             }
+            #[cfg(not(any(feature = "asynk-postgres", feature = "asynk-sqlite", feature = "asynk-mysql")))]
+            BackendSqlX::Dummy => unreachable!(),
         }
     }
 
@@ -117,6 +123,8 @@ impl BackendSqlX {
             BackendSqlX::Sqlite => BackendSqlXSQLite::_name(),
             #[cfg(feature = "asynk-mysql")]
             BackendSqlX::MySql => BackendSqlXMySQL::_name(),
+            #[cfg(not(any(feature = "asynk-postgres", feature = "asynk-sqlite", feature = "asynk-mysql")))]
+            BackendSqlX::Dummy => unreachable!(),
         }
     }
 }