diff --git a/src/SegmentRouter.php b/src/SegmentRouter.php
index f0bc6ef..a149d33 100644
--- a/src/SegmentRouter.php
+++ b/src/SegmentRouter.php
@@ -15,13 +15,16 @@ class SegmentRouter implements RouterInterface
 	 */
 	public function add(string $method, string $route, callable $handler): RouterInterface
 	{
-		// Expand the route into segments and make dynamic segments into a common placeholder
-		$segments = array_map(function($segment) {
-			return str_starts_with($segment, ':') ? ':x' : $segment;
-		}, explode('/', trim($route, '/')));
-
 		// Recursively build the node tree
-		$this->addNode($this->routes, $segments, $method, $handler);
+		$this->addNode(
+			$this->routes,
+			array_map( // Expand the route into segments and make dynamic segments into a common placeholder
+				fn($segment) => str_starts_with($segment, ':') ? ':x' : $segment,
+				explode('/', trim($route, '/'))
+			),
+			$method,
+			$handler
+		);
 
 		// Add the handler to the last node
 		$node[$method] = $handler;