diff --git a/src/xproto.xml b/src/xproto.xml
index 7f30694..514659d 100644
--- a/src/xproto.xml
+++ b/src/xproto.xml
@@ -1421,8 +1421,8 @@ authorization from the authors.
 
   <enum name="CapStyle">
     <item name="NotLast">   <value>0</value></item>
-    <item name="Cap">       <value>1</value></item>
-    <item name="Butt">      <value>2</value></item>
+    <item name="Butt">      <value>1</value></item>
+    <item name="Round">     <value>2</value></item>
     <item name="Projecting"><value>3</value></item>
   </enum>