diff --git a/src/Illuminate/Http/Resources/DelegatesToResource.php b/src/Illuminate/Http/Resources/DelegatesToResource.php
index 036a143100e5..401ba9215ef0 100644
--- a/src/Illuminate/Http/Resources/DelegatesToResource.php
+++ b/src/Illuminate/Http/Resources/DelegatesToResource.php
@@ -50,7 +50,7 @@ public function resolveRouteBinding($value)
      */
     public function offsetExists($offset)
     {
-        return isset($this->resource[$offset]);
+        return (is_array($offset) || $offset instanceof ArrayAccess) && isset($this->resource[$offset]);
     }
 
     /**