diff --git a/protocol/virtual-keyboard-unstable-v1.xml b/protocol/virtual-keyboard-unstable-v1.xml
index 5095c91b8..d9c8464ca 100644
--- a/protocol/virtual-keyboard-unstable-v1.xml
+++ b/protocol/virtual-keyboard-unstable-v1.xml
@@ -39,10 +39,8 @@
       <description summary="keyboard mapping">
         Provide a file descriptor to the compositor which can be
         memory-mapped to provide a keyboard mapping description.
-
-        Format carries a value from the keymap_format enumeration.
       </description>
-      <arg name="format" type="uint" summary="keymap format"/>
+      <arg name="format" type="uint" enum="wl_keyboard.keymap_format" summary="keymap format"/>
       <arg name="fd" type="fd" summary="keymap file descriptor"/>
       <arg name="size" type="uint" summary="keymap size, in bytes"/>
     </request>