diff --git a/contrib/src/gizmos/splittree.cpp b/contrib/src/gizmos/splittree.cpp
index 346659cf30..71cf0e6268 100644
--- a/contrib/src/gizmos/splittree.cpp
+++ b/contrib/src/gizmos/splittree.cpp
@@ -113,7 +113,10 @@ void wxRemotelyScrolledTreeCtrl::SetScrollbars(int pixelsPerUnitX, int pixelsPer
     if (IsKindOf(CLASSINFO(wxGenericTreeCtrl)))
     {
         wxGenericTreeCtrl* win = (wxGenericTreeCtrl*) this;
-        win->wxGenericTreeCtrl::SetScrollbars(pixelsPerUnitX, 0, noUnitsX, 0, xPos, 0, noRefresh);
+//        win->wxGenericTreeCtrl::SetScrollbars(pixelsPerUnitX, 0, noUnitsX, 0, xPos, 0, noRefresh);
+        // Don't refresh, or on wxGTK a portion of the window will be redrawn as if
+        // Y scrolling is at zero
+        win->wxGenericTreeCtrl::SetScrollbars(pixelsPerUnitX, pixelsPerUnitY, noUnitsX, 0, xPos, 0, /* noRefresh */ TRUE);
 
         wxScrolledWindow* scrolledWindow = GetScrolledWindow();
         if (scrolledWindow)