diff --git a/fetch_default_values.py b/fetch_default_values.py
index 4ca16d7..cd3753e 100644
--- a/fetch_default_values.py
+++ b/fetch_default_values.py
@@ -75,7 +75,7 @@ def configureLogging(args):
 
 def parseAllDefinitions(spec):
     root = html.fromstring(spec)
-    defs = root.xpath("//pre[@class='idl highlight def']")
+    defs = root.xpath("//pre[@class='def highlight idl']")
 
     api = WebGpuApi()