1 files changed, 1 insertions, 0 deletions
diff --git a/XI.h b/XI.h
index 79d4fcb..1306bc7 100644
--- a/XI.h
+++ b/XI.h
@@ -319,6 +319,7 @@ SOFTWARE.
 
 /* GE masks */
 #define XI_DeviceHierarchyChangedMask  (1 << 0)
+#define XI_DeviceClassesChangedMask    (1 << 1)
 #define XI_RawDeviceEventMask          (1 << 2)