diff --git a/src/Searchable.php b/src/Searchable.php
index ccffff5..7c61310 100644
--- a/src/Searchable.php
+++ b/src/Searchable.php
@@ -229,6 +229,8 @@ public function addOrWhereRelation(array $wheres, EloquentBuilder $query = null)
      */
     protected function getSearchableEloquentBuilder()
     {
+        $this->resolveModel();
+
         $model        = $this->getSearchableModel();
         $relationship = $this->getRelationship();