diff --git a/xml/cl.xml b/xml/cl.xml
index e13859a..75394cb 100644
--- a/xml/cl.xml
+++ b/xml/cl.xml
@@ -1118,8 +1118,12 @@
             <unused start="0x41A0" end="0x41DF"/>
     </enums>
 
-    <enums namespace="CL" start="0x41E0" end="0x4FFF" comment="Reserved for vendor extensions. Allocate in groups of 16.">
-            <unused start="0x41E0" end="0x4FFF"/>
+    <enums namespace="CL" start="0x41E0" end="0x41FF" vendor="ARM">
+            <unused start="0x41E0" end="0x41FF"/>
+    </enums>
+
+    <enums namespace="CL" start="0x4200" end="0x4FFF" comment="Reserved for vendor extensions. Allocate in groups of 16.">
+            <unused start="0x4200" end="0x4FFF"/>
     </enums>
 
     <enums namespace="CL" start="0x10000" end="0x10FFF" vendor="Khronos" comment="Experimental range for internal development only. Do not allocate.">