diff --git a/scrapy/trunk/docs/topics/architecture.rst b/scrapy/trunk/docs/topics/architecture.rst
index 02d0298df..e61c72ef6 100644
--- a/scrapy/trunk/docs/topics/architecture.rst
+++ b/scrapy/trunk/docs/topics/architecture.rst
@@ -4,8 +4,8 @@
 Architecture
 ============
 
-This document describes the architecture of Scrapy and how they components
-interact between each other.
+This document describes the architecture of Scrapy and how their components
+interact.
 
 Overview
 ========