diff --git a/common/view/wx_view_controls.cpp b/common/view/wx_view_controls.cpp
index 469084df5d..ad47dec39d 100644
--- a/common/view/wx_view_controls.cpp
+++ b/common/view/wx_view_controls.cpp
@@ -59,7 +59,9 @@ WX_VIEW_CONTROLS::WX_VIEW_CONTROLS( VIEW* aView, wxScrolledCanvas* aParentPanel
         m_state( IDLE ),
         m_parentPanel( aParentPanel ),
         m_scrollScale( 1.0, 1.0 ),
+#ifdef __WXGTK3__
         m_lastTimestamp( 0 ),
+#endif
         m_cursorPos( 0, 0 ),
         m_updateCursor( true )
 {
diff --git a/include/view/wx_view_controls.h b/include/view/wx_view_controls.h
index 2809ee2651..f94182d9fb 100644
--- a/include/view/wx_view_controls.h
+++ b/include/view/wx_view_controls.h
@@ -161,8 +161,10 @@ private:
     /// Current scrollbar position
     VECTOR2I    m_scrollPos;
 
-    /// Last event timestamp to remove duplicates
+#ifdef __WXGTK3__
+    /// Last event timestamp used to de-bounce mouse wheel
     long int    m_lastTimestamp;
+#endif
 
     /// Current cursor position (world coordinates)
     VECTOR2D    m_cursorPos;