diff --git a/libraries/src/Router/SiteRouter.php b/libraries/src/Router/SiteRouter.php
index b0666252ec423..89d032608235c 100644
--- a/libraries/src/Router/SiteRouter.php
+++ b/libraries/src/Router/SiteRouter.php
@@ -617,6 +617,35 @@ public function getComponentRouter($component)
 				$this->componentRouters[$component] = $componentInstance->createRouter($this->app, $this->menu);
 			}
 
+			// Keep support for components implementing the new format but don't implement the RouterServiceInterface
+			if (!isset($this->componentRouters[$component]))
+			{
+				$compname = ucfirst(substr($component, 4));
+				$class = $compname . 'Router';
+
+				if (!class_exists($class))
+				{
+					// Use the component routing handler if it exists
+					$path = JPATH_SITE . '/components/' . $component . '/router.php';
+
+					// Use the custom routing handler if it exists
+					if (file_exists($path))
+					{
+						require_once $path;
+					}
+				}
+
+				if (class_exists($class))
+				{
+					$reflection = new \ReflectionClass($class);
+
+					if (in_array('Joomla\\CMS\\Component\\Router\\RouterInterface', $reflection->getInterfaceNames()))
+					{
+						$this->componentRouters[$component] = new $class($this->app, $this->menu);
+					}
+				}
+			}
+
 			if (!isset($this->componentRouters[$component]))
 			{
 				$this->componentRouters[$component] = new RouterLegacy(ucfirst(substr($component, 4)));