diff --git a/src/Symfony/Bundle/SecurityBundle/DependencyInjection/SecurityExtension.php b/src/Symfony/Bundle/SecurityBundle/DependencyInjection/SecurityExtension.php
index 851f7da786..b99c44f91b 100644
--- a/src/Symfony/Bundle/SecurityBundle/DependencyInjection/SecurityExtension.php
+++ b/src/Symfony/Bundle/SecurityBundle/DependencyInjection/SecurityExtension.php
@@ -553,7 +553,7 @@ class SecurityExtension extends Extension implements PrependExtensionInterface
                 $config['algorithm'] = 'native';
                 $config['native_algorithm'] = PASSWORD_ARGON2I;
             } else {
-                throw new InvalidConfigurationException(sprintf('Algorithm "argon2i" is not available. Either use %s"auto" or upgrade to PHP 7.2+ instead.', \defined('SODIUM_CRYPTO_PWHASH_ALG_ARGON2ID13') ? '"argon2id", ' : ''));
+                throw new InvalidConfigurationException(sprintf('Algorithm "argon2i" is not available. Either use "%s" or upgrade to PHP 7.2+ instead.', \defined('SODIUM_CRYPTO_PWHASH_ALG_ARGON2ID13') ? 'argon2id", "auto' : 'auto'));
             }
 
             return $this->createEncoder($config);
@@ -566,7 +566,7 @@ class SecurityExtension extends Extension implements PrependExtensionInterface
                 $config['algorithm'] = 'native';
                 $config['native_algorithm'] = PASSWORD_ARGON2ID;
             } else {
-                throw new InvalidConfigurationException(sprintf('Algorithm "argon2id" is not available. Either use %s"auto", upgrade to PHP 7.3+ or use libsodium 1.0.15+ instead.', \defined('PASSWORD_ARGON2I') || $hasSodium ? '"argon2i", ' : ''));
+                throw new InvalidConfigurationException(sprintf('Algorithm "argon2id" is not available. Either use "%s", upgrade to PHP 7.3+ or use libsodium 1.0.15+ instead.', \defined('PASSWORD_ARGON2I') || $hasSodium ? 'argon2i", "auto' : 'auto'));
             }
 
             return $this->createEncoder($config);