diff --git a/core/lib/Drupal/Core/Validation/Plugin/Validation/Constraint/UniqueFieldConstraint.php b/core/lib/Drupal/Core/Validation/Plugin/Validation/Constraint/UniqueFieldConstraint.php
index 770b375..9c7389b 100644
--- a/core/lib/Drupal/Core/Validation/Plugin/Validation/Constraint/UniqueFieldConstraint.php
+++ b/core/lib/Drupal/Core/Validation/Plugin/Validation/Constraint/UniqueFieldConstraint.php
@@ -12,7 +12,7 @@
 /**
  * Checks if an entity field has a unique value.
  *
- * @Plugin(
+ * @Constraint(
  *   id = "UniqueField",
  *   label = @Translation("Unique field constraint", context = "Validation"),
  * )