diff --git a/wgsl.xml b/wgsl.xml
index 23b95f0..91689a0 100644
--- a/wgsl.xml
+++ b/wgsl.xml
@@ -266,7 +266,8 @@
 		</list>
 
 		<list name="Extension Address Spaces">
-			<item>push_constant</item>
+			<item>push_constant</item> <!-- obsolete -->
+			<item>immediate</item>
 		</list>
 
 		<list name="Access Modes">