diff --git a/src/Symfony/Component/Console/Application.php b/src/Symfony/Component/Console/Application.php
index 9cdcef88cd042..84eaec66a3c24 100644
--- a/src/Symfony/Component/Console/Application.php
+++ b/src/Symfony/Component/Console/Application.php
@@ -1147,7 +1147,7 @@ private function findAlternatives(string $name, iterable $collection): array
      */
     public function setDefaultCommand(string $commandName, bool $isSingleCommand = false)
     {
-        $this->defaultCommand = $commandName;
+        $this->defaultCommand = explode('|', ltrim($commandName, '|'))[0];
 
         if ($isSingleCommand) {
             // Ensure the command exist
diff --git a/src/Symfony/Component/Console/Tests/Command/CommandTest.php b/src/Symfony/Component/Console/Tests/Command/CommandTest.php
index 839beac3f0145..81d4b9bba95e3 100644
--- a/src/Symfony/Component/Console/Tests/Command/CommandTest.php
+++ b/src/Symfony/Component/Console/Tests/Command/CommandTest.php
@@ -422,6 +422,25 @@ public function testCommandAttribute()
         $this->assertTrue($command->isHidden());
         $this->assertSame(['f'], $command->getAliases());
     }
+
+    /**
+     * @requires PHP 8
+     */
+    public function testDefaultCommand()
+    {
+        $apl = new Application();
+        $apl->setDefaultCommand(Php8Command::getDefaultName());
+        $property = new \ReflectionProperty($apl, 'defaultCommand');
+        $property->setAccessible(true);
+
+        $this->assertEquals('foo', $property->getValue($apl));
+
+        $apl->setDefaultCommand(Php8Command2::getDefaultName());
+        $property = new \ReflectionProperty($apl, 'defaultCommand');
+        $property->setAccessible(true);
+
+        $this->assertEquals('foo2', $property->getValue($apl));
+    }
 }
 
 // In order to get an unbound closure, we should create it outside a class
@@ -437,3 +456,8 @@ function createClosure()
 class Php8Command extends Command
 {
 }
+
+#[AsCommand(name: 'foo2', description: 'desc2', hidden: true)]
+class Php8Command2 extends Command
+{
+}