diff --git a/src/Symfony/Component/HttpKernel/Controller/ContainerControllerResolver.php b/src/Symfony/Component/HttpKernel/Controller/ContainerControllerResolver.php
index 4f80921cf58f..b9e8de78937a 100644
--- a/src/Symfony/Component/HttpKernel/Controller/ContainerControllerResolver.php
+++ b/src/Symfony/Component/HttpKernel/Controller/ContainerControllerResolver.php
@@ -59,7 +59,7 @@ protected function instantiateController($class)
         $this->throwExceptionIfControllerWasRemoved($class, $e);
 
         if ($e instanceof \ArgumentCountError) {
-            throw new \InvalidArgumentException(sprintf('Controller "%s" has required constructor arguments and does not exist in the container. Did you forget to define such a service?', $class), 0, $e);
+            throw new \InvalidArgumentException(sprintf('Controller "%s" has required constructor arguments and does not exist in the container. Did you forget to define the controller as a service?', $class), 0, $e);
         }
 
         throw new \InvalidArgumentException(sprintf('Controller "%s" does neither exist as service nor as class', $class), 0, $e);
diff --git a/src/Symfony/Component/HttpKernel/Tests/Controller/ContainerControllerResolverTest.php b/src/Symfony/Component/HttpKernel/Tests/Controller/ContainerControllerResolverTest.php
index 27f35b64c604..2e856d97e4ab 100644
--- a/src/Symfony/Component/HttpKernel/Tests/Controller/ContainerControllerResolverTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/Controller/ContainerControllerResolverTest.php
@@ -184,16 +184,16 @@ public function getUndefinedControllers()
         $tests[] = [
             [ControllerTestService::class, 'action'],
             \InvalidArgumentException::class,
-            'Controller "Symfony\Component\HttpKernel\Tests\Controller\ControllerTestService" has required constructor arguments and does not exist in the container. Did you forget to define such a service?',
+            'Controller "Symfony\Component\HttpKernel\Tests\Controller\ControllerTestService" has required constructor arguments and does not exist in the container. Did you forget to define the controller as a service?',
         ];
         $tests[] = [
             ControllerTestService::class.'::action',
-            \InvalidArgumentException::class, 'Controller "Symfony\Component\HttpKernel\Tests\Controller\ControllerTestService" has required constructor arguments and does not exist in the container. Did you forget to define such a service?',
+            \InvalidArgumentException::class, 'Controller "Symfony\Component\HttpKernel\Tests\Controller\ControllerTestService" has required constructor arguments and does not exist in the container. Did you forget to define the controller as a service?',
         ];
         $tests[] = [
             InvokableControllerService::class,
             \InvalidArgumentException::class,
-            'Controller "Symfony\Component\HttpKernel\Tests\Controller\InvokableControllerService" has required constructor arguments and does not exist in the container. Did you forget to define such a service?',
+            'Controller "Symfony\Component\HttpKernel\Tests\Controller\InvokableControllerService" has required constructor arguments and does not exist in the container. Did you forget to define the controller as a service?',
         ];
 
         return $tests;