diff --git a/core/routes.php b/core/routes.php
index 49938d6a36..5fb13bc298 100644
--- a/core/routes.php
+++ b/core/routes.php
@@ -88,10 +88,10 @@ $application->registerRoutes($this, [
 
 		// Legacy routes that need to be globally available while they are handled by an app
 		['name' => 'viewcontroller#showFile', 'url' => '/f/{fileid}', 'verb' => 'GET', 'app' => 'files'],
-		['name' => 'share#showShare', 'url' => '/s/{token}', 'verb' => 'GET', 'app' => 'files_sharing'],
-		['name' => 'share#showAuthenticate', 'url' => '/s/{token}/authenticate/{redirect}', 'verb' => 'GET', 'app' => 'files_sharing'],
-		['name' => 'share#authenticate', 'url' => '/s/{token}/authenticate/{redirect}', 'verb' => 'POST', 'app' => 'files_sharing'],
-		['name' => 'share#downloadShare', 'url' => '/s/{token}/download', 'verb' => 'GET', 'app' => 'files_sharing'],
+		['name' => 'sharecontroller#showShare', 'url' => '/s/{token}', 'verb' => 'GET', 'app' => 'files_sharing'],
+		['name' => 'sharecontroller#showAuthenticate', 'url' => '/s/{token}/authenticate/{redirect}', 'verb' => 'GET', 'app' => 'files_sharing'],
+		['name' => 'sharecontroller#authenticate', 'url' => '/s/{token}/authenticate/{redirect}', 'verb' => 'POST', 'app' => 'files_sharing'],
+		['name' => 'sharecontroller#downloadShare', 'url' => '/s/{token}/download', 'verb' => 'GET', 'app' => 'files_sharing'],
 		['name' => 'publicpreview#directLink', 'url' => '/s/{token}/preview', 'verb' => 'GET', 'app' => 'files_sharing'],
 		['name' => 'requesthandlercontroller#addShare', 'url' => '/ocm/shares', 'verb' => 'POST', 'app' => 'cloud_federation_api'],
 		['name' => 'requesthandlercontroller#receiveNotification', 'url' => '/ocm/notifications', 'verb' => 'POST', 'app' => 'cloud_federation_api'],
diff --git a/lib/public/AppFramework/AuthPublicShareController.php b/lib/public/AppFramework/AuthPublicShareController.php
index 969fd0bfe6..9e8daa8d34 100644
--- a/lib/public/AppFramework/AuthPublicShareController.php
+++ b/lib/public/AppFramework/AuthPublicShareController.php
@@ -156,15 +156,6 @@ abstract class AuthPublicShareController extends PublicShareController {
 		);
 	}
 
-	/**
-	 * @param $string
-	 * @return string
-	 */
-	private function camelCaseToLowerCaseUnderscored($string)
-	{
-		$value = preg_replace('/(?<=\\w)([A-Z])/', '_\\1', $string);
-		return mb_strtolower($value, 'utf-8');
-	}
 
 	/**
 	 * @since 14.0.0
@@ -172,7 +163,11 @@ abstract class AuthPublicShareController extends PublicShareController {
 	private function getRoute(string $function): string {
 		$app = strtolower($this->appName);
 		$class = (new \ReflectionClass($this))->getShortName();
-		// $class = $this->camelCaseToLowerCaseUnderscored(substr($class, 0, strpos($class, 'Controller')));
+		if ($this->appName === 'files_sharing') {
+			$class = strtolower($class);
+		} else if (substr($class, -10) === 'Controller') {
+			$class = substr($class, 0, -10);
+		}
 		return $app .'.'. $class .'.'. $function;
 	}