diff --git a/protocol/wayland.xml b/protocol/wayland.xml
index d9fb5c2..9d93f4a 100644
--- a/protocol/wayland.xml
+++ b/protocol/wayland.xml
@@ -852,7 +852,7 @@
 
       <arg name="time" type="uint"/>
       <arg name="axis" type="uint"/>
-      <arg name="value" type="int"/>
+      <arg name="value" type="fixed"/>
     </event>
   </interface>