diff --git a/modules/@angular/router/src/url_tree.ts b/modules/@angular/router/src/url_tree.ts
index 7888435716..ae9e6fbe04 100644
--- a/modules/@angular/router/src/url_tree.ts
+++ b/modules/@angular/router/src/url_tree.ts
@@ -40,7 +40,7 @@ function equalSegmentGroups(container: UrlSegmentGroup, containee: UrlSegmentGro
 
 function containsQueryParams(
     container: {[k: string]: string}, containee: {[k: string]: string}): boolean {
-  return Object.keys(containee) <= Object.keys(container) &&
+  return Object.keys(containee).length <= Object.keys(container).length &&
       Object.keys(containee).every(key => containee[key] === container[key]);
 }
 
diff --git a/modules/@angular/router/test/url_tree.spec.ts b/modules/@angular/router/test/url_tree.spec.ts
index d9d57c572b..f60151ddcc 100644
--- a/modules/@angular/router/test/url_tree.spec.ts
+++ b/modules/@angular/router/test/url_tree.spec.ts
@@ -102,8 +102,8 @@ describe('UrlTree', () => {
       });
 
       it('should return true when container contains containees queryParams', () => {
-        const t1 = serializer.parse('/one/two?test=1&page=5');
-        const t2 = serializer.parse('/one/two?test=1');
+        const t1 = serializer.parse('/one/two?test=1&u=5');
+        const t2 = serializer.parse('/one/two?u=5');
         expect(containsTree(t1, t2, false)).toBe(true);
       });