diff --git a/lib/full_url_for.js b/lib/full_url_for.js
index 0d4e8828..d22e194a 100755
--- a/lib/full_url_for.js
+++ b/lib/full_url_for.js
@@ -17,7 +17,7 @@ function fullUrlForHelper(path = '/') {
 
   const { trailing_index } = Object.assign({
     trailing_index: true
-  }, config.pretty_url);
+  }, config.pretty_urls);
 
   if (!trailing_index) path = path.replace(/index\.html$/, '');
 
diff --git a/lib/url_for.js b/lib/url_for.js
index 6e7e1329..ffc44e19 100644
--- a/lib/url_for.js
+++ b/lib/url_for.js
@@ -29,7 +29,7 @@ function urlForHelper(path = '/', options) {
 
   const { trailing_index } = Object.assign({
     trailing_index: true
-  }, config.pretty_url);
+  }, config.pretty_urls);
 
   if (!trailing_index) path = path.replace(/index\.html$/, '');
 
diff --git a/test/full_url_for.spec.js b/test/full_url_for.spec.js
index c6949f89..44c92725 100755
--- a/test/full_url_for.spec.js
+++ b/test/full_url_for.spec.js
@@ -26,9 +26,9 @@ describe('full_url_for', () => {
     fullUrlFor('/index.html').should.eql('https://example.com/index.html');
   });
 
-  it('internal url - pretty_url.trailing_index disabled', () => {
+  it('internal url - pretty_urls.trailing_index disabled', () => {
     ctx.config.url = 'https://example.com';
-    ctx.config.pretty_url = {
+    ctx.config.pretty_urls = {
       trailing_index: false
     };
 
diff --git a/test/url_for.spec.js b/test/url_for.spec.js
index 1a07b6e9..387eb6a7 100644
--- a/test/url_for.spec.js
+++ b/test/url_for.spec.js
@@ -64,7 +64,7 @@ describe('url_for', () => {
 
   it('internal url (pretty_url.trailing_index disabled)', () => {
     ctx.config.root = '/';
-    ctx.config.pretty_url = {
+    ctx.config.pretty_urls = {
       trailing_index: false
     };