diff --git a/gdk/Gdk.metadata b/gdk/Gdk.metadata
index 7b6d37a99..efbe5c538 100644
--- a/gdk/Gdk.metadata
+++ b/gdk/Gdk.metadata
@@ -50,6 +50,8 @@
   <attr path="/api/namespace/object[@cname='GdkDevice']/method[@name='ListSlaveDevices']/return-type" name="element_type">GdkDevice*</attr>
   <attr path="/api/namespace/object[@cname='GdkDevice']/method[@name='ListSlaveDevices']/return-type" name="owned">true</attr>
   <attr path="/api/namespace/object[@cname='GdkDevice']/method[@name='ListSlaveDevices']/return-type" name="elements_owned">false</attr>
+  <attr path="/api/namespace/object[@cname='GdkDevice']/method[@cname='gdk_device_get_n_axes']" name="name">GetNumAxes</attr>
+  <attr path="/api/namespace/object[@cname='GdkDevice']/property[@cname='n-axes']" name="name">NumAxes</attr>
   <attr path="/api/namespace/object[@cname='GdkDeviceManager']/method[@name='ListDevices']/return-type" name="element_type">GdkDevice*</attr>
   <attr path="/api/namespace/object[@cname='GdkDeviceManager']/method[@name='ListDevices']/return-type" name="owned">true</attr>
   <attr path="/api/namespace/object[@cname='GdkDeviceManager']/method[@name='ListDevices']/return-type" name="elements_owned">false</attr>