diff --git a/src/Symfony/Bridge/Doctrine/Form/ChoiceList/ORMQueryBuilderLoader.php b/src/Symfony/Bridge/Doctrine/Form/ChoiceList/ORMQueryBuilderLoader.php
index efefb28f85..e38a7268be 100644
--- a/src/Symfony/Bridge/Doctrine/Form/ChoiceList/ORMQueryBuilderLoader.php
+++ b/src/Symfony/Bridge/Doctrine/Form/ChoiceList/ORMQueryBuilderLoader.php
@@ -12,8 +12,10 @@
 namespace Symfony\Bridge\Doctrine\Form\ChoiceList;
 
 use Doctrine\DBAL\Connection;
+use Doctrine\DBAL\Types\ConversionException;
 use Doctrine\DBAL\Types\Type;
 use Doctrine\ORM\QueryBuilder;
+use Symfony\Component\Form\Exception\TransformationFailedException;
 
 /**
  * Loads entities using a {@link QueryBuilder} instance.
@@ -96,7 +98,11 @@ class ORMQueryBuilderLoader implements EntityLoaderInterface
                 $doctrineType = Type::getType($type);
                 $platform = $qb->getEntityManager()->getConnection()->getDatabasePlatform();
                 foreach ($values as &$value) {
-                    $value = $doctrineType->convertToDatabaseValue($value, $platform);
+                    try {
+                        $value = $doctrineType->convertToDatabaseValue($value, $platform);
+                    } catch (ConversionException $e) {
+                        throw new TransformationFailedException(sprintf('Failed to transform "%s" into "%s".', $value, $type), 0, $e);
+                    }
                 }
                 unset($value);
             }
diff --git a/src/Symfony/Bridge/Doctrine/Tests/Form/ChoiceList/ORMQueryBuilderLoaderTest.php b/src/Symfony/Bridge/Doctrine/Tests/Form/ChoiceList/ORMQueryBuilderLoaderTest.php
index 1702532aa6..caebae1848 100644
--- a/src/Symfony/Bridge/Doctrine/Tests/Form/ChoiceList/ORMQueryBuilderLoaderTest.php
+++ b/src/Symfony/Bridge/Doctrine/Tests/Form/ChoiceList/ORMQueryBuilderLoaderTest.php
@@ -20,6 +20,7 @@ use Symfony\Bridge\Doctrine\Form\ChoiceList\ORMQueryBuilderLoader;
 use Symfony\Bridge\Doctrine\Test\DoctrineTestHelper;
 use Symfony\Bridge\Doctrine\Types\UlidType;
 use Symfony\Bridge\Doctrine\Types\UuidType;
+use Symfony\Component\Form\Exception\TransformationFailedException;
 use Symfony\Component\Uid\Uuid;
 
 class ORMQueryBuilderLoaderTest extends TestCase
@@ -188,6 +189,41 @@ class ORMQueryBuilderLoaderTest extends TestCase
         $loader->getEntitiesByIds('id', ['71c5fd46-3f16-4abb-bad7-90ac1e654a2d', '', 'b98e8e11-2897-44df-ad24-d2627eb7f499']);
     }
 
+    /**
+     * @dataProvider provideUidEntityClasses
+     */
+    public function testUidThrowProperException($entityClass)
+    {
+        if (Type::hasType('uuid')) {
+            Type::overrideType('uuid', UuidType::class);
+        } else {
+            Type::addType('uuid', UuidType::class);
+        }
+        if (!Type::hasType('ulid')) {
+            Type::addType('ulid', UlidType::class);
+        }
+
+        $em = DoctrineTestHelper::createTestEntityManager();
+
+        $qb = $this->getMockBuilder('Doctrine\ORM\QueryBuilder')
+            ->setConstructorArgs([$em])
+            ->setMethods(['getQuery'])
+            ->getMock();
+
+        $qb->expects($this->never())
+            ->method('getQuery');
+
+        $qb->select('e')
+            ->from($entityClass, 'e');
+
+        $loader = new ORMQueryBuilderLoader($qb);
+
+        $this->expectException(TransformationFailedException::class);
+        $this->expectExceptionMessageMatches('/^Failed to transform "hello" into "(uuid|ulid)"\.$/');
+
+        $loader->getEntitiesByIds('id', ['hello']);
+    }
+
     public function testEmbeddedIdentifierName()
     {
         if (Version::compare('2.5.0') > 0) {