diff --git a/chapter08/python.xml b/chapter08/python.xml
index 81178ca1a..f25b8a691 100644
--- a/chapter08/python.xml
+++ b/chapter08/python.xml
@@ -17,7 +17,7 @@
   <title>Python-&python-version;</title>
 
   <indexterm zone="ch-system-Python">
-    <primary sortas="a-python">python</primary>
+    <primary sortas="a-Python">Python</primary>
   </indexterm>
 
   <sect2 role="package">