diff --git a/lib/Doctrine/DBAL/Query/Expression/CompositeExpression.php b/lib/Doctrine/DBAL/Query/Expression/CompositeExpression.php
index 596e9fb3afc..70721b15576 100644
--- a/lib/Doctrine/DBAL/Query/Expression/CompositeExpression.php
+++ b/lib/Doctrine/DBAL/Query/Expression/CompositeExpression.php
@@ -3,6 +3,7 @@
 namespace Doctrine\DBAL\Query\Expression;
 
 use Countable;
+use Doctrine\Deprecations\Deprecation;
 
 use function array_merge;
 use function count;
@@ -97,6 +98,12 @@ public function addMultiple(array $parts = [])
      */
     public function add($part)
     {
+        Deprecation::trigger(
+            'doctrine/dbal',
+            'https://github.com/doctrine/dbal/issues/3844',
+            'CompositeExpression::add()/addMultiple()  are deprecated, use CompositeExpression::with() instead.'
+        );
+
         if (empty($part)) {
             return $this;
         }