diff --git a/interface/wx/event.h b/interface/wx/event.h
index 5963edae10..638b862231 100644
--- a/interface/wx/event.h
+++ b/interface/wx/event.h
@@ -1683,6 +1683,14 @@ public:
     */
     int GetWheelRotation() const;
 
+    /**
+        Gets the axis the wheel operation concerns; @c 0 is the Y axis as on
+        most mouse wheels, @c 1 is the X axis.
+
+        Note that only some models of mouse have horizontal wheel axis.
+    */
+    int GetWheelAxis() const;
+
     /**
         Returns X coordinate of the physical mouse event position.
     */