diff --git a/docs/intro/overview.rst b/docs/intro/overview.rst
index 953fdc968..7195017ff 100644
--- a/docs/intro/overview.rst
+++ b/docs/intro/overview.rst
@@ -39,7 +39,7 @@ http://quotes.toscrape.com, following the pagination::
                 }
 
             next_page = response.css('li.next a::attr("href")').extract_first()
-            if next_page:
+            if next_page is not None:
                 next_page = response.urljoin(next_page)
                 yield scrapy.Request(next_page, callback=self.parse)