diff --git a/UPGRADE-4.3.md b/UPGRADE-4.3.md
index 531a8e61b99b6..7a6abcca81566 100644
--- a/UPGRADE-4.3.md
+++ b/UPGRADE-4.3.md
@@ -297,6 +297,8 @@ Workflow
                    type: method
    ```
 
+ * Using `DefinitionBuilder::setInitialPlace()` is deprecated, use `DefinitionBuilder::setInitialPlaces()` instead.
+
 Yaml
 ----
 
diff --git a/UPGRADE-5.0.md b/UPGRADE-5.0.md
index b753931008327..e16fb86c79850 100644
--- a/UPGRADE-5.0.md
+++ b/UPGRADE-5.0.md
@@ -385,11 +385,11 @@ TwigBundle
  * The default value (`false`) of the `twig.strict_variables` configuration option has been changed to `%kernel.debug%`.
  * The `transchoice` tag and filter have been removed, use the `trans` ones instead with a `%count%` parameter.
  * Removed support for legacy templates directories `src/Resources/views/` and `src/Resources/<BundleName>/views/`, use `templates/` and `templates/bundles/<BundleName>/` instead.
- 
+
 TwigBridge
 ----------
 
- * removed the `$requestStack` and `$requestContext` arguments of the 
+ * removed the `$requestStack` and `$requestContext` arguments of the
    `HttpFoundationExtension`, pass a `Symfony\Component\HttpFoundation\UrlHelper`
    instance as the only argument instead
 
@@ -417,6 +417,7 @@ Workflow
  * `MarkingStoreInterface::setMarking()` has a third argument: `array $context = []`.
  * Removed support of `initial_place`. Use `initial_places` instead.
  * `MultipleStateMarkingStore` has been removed. Use `MethodMarkingStore` instead.
+ * `DefinitionBuilder::setInitialPlace()` has been removed, use `DefinitionBuilder::setInitialPlaces()` instead.
 
    Before:
    ```yaml
diff --git a/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/FrameworkExtension.php b/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/FrameworkExtension.php
index fdff97bfcd42d..b5bb52a17f137 100644
--- a/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/FrameworkExtension.php
+++ b/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/FrameworkExtension.php
@@ -706,13 +706,10 @@ private function registerWorkflowConfiguration(array $config, ContainerBuilder $
             }
 
             if ($validator) {
-                $realDefinition = (new Workflow\DefinitionBuilder($places))
-                    ->addTransitions(array_map(function (Reference $ref) use ($container): Workflow\Transition {
-                        return $container->get((string) $ref);
-                    }, $transitions))
-                    ->setInitialPlace($initialMarking)
-                    ->build()
-                ;
+                $trs = array_map(function (Reference $ref) use ($container): Workflow\Transition {
+                    return $container->get((string) $ref);
+                }, $transitions);
+                $realDefinition = new Workflow\Definition($places, $trs, $initialMarking);
                 $validator->validate($realDefinition, $name);
             }
 
diff --git a/src/Symfony/Component/Workflow/CHANGELOG.md b/src/Symfony/Component/Workflow/CHANGELOG.md
index 5a32b915e50e7..2d0870d34b7c5 100644
--- a/src/Symfony/Component/Workflow/CHANGELOG.md
+++ b/src/Symfony/Component/Workflow/CHANGELOG.md
@@ -28,6 +28,7 @@ CHANGELOG
  * Dispatch `CompletedEvent` on `workflow.completed`
  * Dispatch `AnnounceEvent` on `workflow.announce`
  * Added support for many `initialPlaces`
+ * Deprecated `DefinitionBuilder::setInitialPlace()` method, use `DefinitionBuilder::setInitialPlaces()` instead.
  * Deprecated the `MultipleStateMarkingStore` class, use the `MethodMarkingStore` instead.
  * Deprecated the `SingleStateMarkingStore` class, use the `MethodMarkingStore` instead.
 
diff --git a/src/Symfony/Component/Workflow/Definition.php b/src/Symfony/Component/Workflow/Definition.php
index 1ecbc0dfb56e0..8a6e94206d49c 100644
--- a/src/Symfony/Component/Workflow/Definition.php
+++ b/src/Symfony/Component/Workflow/Definition.php
@@ -48,13 +48,13 @@ public function __construct(array $places, array $transitions, $initialPlaces =
     }
 
     /**
-     * @deprecated since Symfony 4.3. Use the getInitialPlaces() instead.
+     * @deprecated since Symfony 4.3. Use getInitialPlaces() instead.
      *
      * @return string|null
      */
     public function getInitialPlace()
     {
-        @trigger_error(sprintf('Calling %s::getInitialPlace() is deprecated. Call %s::getInitialPlaces() instead.', __CLASS__, __CLASS__));
+        @trigger_error(sprintf('Calling %s::getInitialPlace() is deprecated since Symfony 4.3. Call getInitialPlaces() instead.', __CLASS__), E_USER_DEPRECATED);
 
         if (!$this->initialPlaces) {
             return null;
diff --git a/src/Symfony/Component/Workflow/DefinitionBuilder.php b/src/Symfony/Component/Workflow/DefinitionBuilder.php
index 8fa90471ddec1..4bb6df4b0dc5e 100644
--- a/src/Symfony/Component/Workflow/DefinitionBuilder.php
+++ b/src/Symfony/Component/Workflow/DefinitionBuilder.php
@@ -24,7 +24,7 @@ class DefinitionBuilder
 {
     private $places = [];
     private $transitions = [];
-    private $initialPlace;
+    private $initialPlaces;
     private $metadataStore;
 
     /**
@@ -42,7 +42,7 @@ public function __construct(array $places = [], array $transitions = [])
      */
     public function build()
     {
-        return new Definition($this->places, $this->transitions, $this->initialPlace, $this->metadataStore);
+        return new Definition($this->places, $this->transitions, $this->initialPlaces, $this->metadataStore);
     }
 
     /**
@@ -54,20 +54,36 @@ public function clear()
     {
         $this->places = [];
         $this->transitions = [];
-        $this->initialPlace = null;
+        $this->initialPlaces = null;
         $this->metadataStore = null;
 
         return $this;
     }
 
     /**
+     * @deprecated since Symfony 4.3. Use setInitialPlaces() instead.
+     *
      * @param string $place
      *
      * @return $this
      */
     public function setInitialPlace($place)
     {
-        $this->initialPlace = $place;
+        @trigger_error(sprintf('Calling %s::setInitialPlace() is deprecated since Symfony 4.3. Call setInitialPlaces() instead.', __CLASS__), E_USER_DEPRECATED);
+
+        $this->initialPlaces = $place;
+
+        return $this;
+    }
+
+    /**
+     * @param string|string[]|null $initialPlaces
+     *
+     * @return $this
+     */
+    public function setInitialPlaces($initialPlaces)
+    {
+        $this->initialPlaces = $initialPlaces;
 
         return $this;
     }
@@ -80,7 +96,7 @@ public function setInitialPlace($place)
     public function addPlace($place)
     {
         if (!$this->places) {
-            $this->initialPlace = $place;
+            $this->initialPlaces = $place;
         }
 
         $this->places[$place] = $place;
diff --git a/src/Symfony/Component/Workflow/Tests/DefinitionBuilderTest.php b/src/Symfony/Component/Workflow/Tests/DefinitionBuilderTest.php
index 62351d7d9218a..df8d9bb8b36bd 100644
--- a/src/Symfony/Component/Workflow/Tests/DefinitionBuilderTest.php
+++ b/src/Symfony/Component/Workflow/Tests/DefinitionBuilderTest.php
@@ -9,6 +9,7 @@
 
 class DefinitionBuilderTest extends TestCase
 {
+    /** @group legacy */
     public function testSetInitialPlace()
     {
         $builder = new DefinitionBuilder(['a', 'b']);
@@ -18,6 +19,15 @@ public function testSetInitialPlace()
         $this->assertEquals(['b'], $definition->getInitialPlaces());
     }
 
+    public function testSetInitialPlaces()
+    {
+        $builder = new DefinitionBuilder(['a', 'b']);
+        $builder->setInitialPlaces('b');
+        $definition = $builder->build();
+
+        $this->assertEquals(['b'], $definition->getInitialPlaces());
+    }
+
     public function testAddTransition()
     {
         $places = range('a', 'b');

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