diff --git a/src/CoreBundle/Validator/Constraints/InlineConstraint.php b/src/CoreBundle/Validator/Constraints/InlineConstraint.php
index c5288bfa..b089225a 100755
--- a/src/CoreBundle/Validator/Constraints/InlineConstraint.php
+++ b/src/CoreBundle/Validator/Constraints/InlineConstraint.php
@@ -13,7 +13,7 @@
 
 namespace Sonata\CoreBundle\Validator\Constraints;
 
-if (!class_exists(Sonata\Form\Validator\Constraints\InlineConstraint::class, false)) {
+if (!class_exists(\Sonata\Form\Validator\Constraints\InlineConstraint::class, false)) {
     @trigger_error(
         'The '.__NAMESPACE__.'\InlineConstraint class is deprecated since version 3.13.0 and will be removed in 4.0.'
         .' Use Sonata\Form\Validator\Constraint\InlineConstraint instead.',