diff --git a/modules/@angular/router/src/url_tree.ts b/modules/@angular/router/src/url_tree.ts
index b158116504..6aeeb32b48 100644
--- a/modules/@angular/router/src/url_tree.ts
+++ b/modules/@angular/router/src/url_tree.ts
@@ -195,7 +195,7 @@ export class UrlSegmentGroup {
 export class UrlSegment {
   constructor(
       /**
-       * The part part of a URL segment.
+       * The path part of a URL segment.
        */
       public path: string,