diff --git a/src/ORM/Rule/ExistsIn.php b/src/ORM/Rule/ExistsIn.php
index 5b20f61beb4..097892875e5 100644
--- a/src/ORM/Rule/ExistsIn.php
+++ b/src/ORM/Rule/ExistsIn.php
@@ -114,7 +114,7 @@ public function __invoke(EntityInterface $entity, array $options)
     }
 
     /**
-     * Check whether or not the entity fields nullable and null.
+     * Check whether or not the entity fields are nullable and null.
      *
      * @param \Cake\ORM\EntityInterface $entity The entity to check.
      * @param \Cake\ORM\Table $source The table to use schema from.