diff --git a/src/xf86vidmode.xml b/src/xf86vidmode.xml
index 1cd63d7..718240c 100644
--- a/src/xf86vidmode.xml
+++ b/src/xf86vidmode.xml
@@ -443,7 +443,7 @@ authorization from the authors.
 	</reply>
     </request>
 
-    <request name="GetPermissions" opcode="19">
+    <request name="GetPermissions" opcode="20">
 	<field type="CARD16" name="screen" />
 	<pad bytes="2" />
 	<reply>