diff --git a/src/Client.php b/src/Client.php
index 0039115d8..6952d5783 100644
--- a/src/Client.php
+++ b/src/Client.php
@@ -51,7 +51,7 @@ public function user()
         $provider = $this->provider ?: config('auth.guards.api.provider');
 
         return $this->belongsTo(
-            config("auth.providers.$provider.model")
+            config("auth.providers.{$provider}.model")
         );
     }