diff -urN gtk+-3.20.6-orig/gtk/gtkrange.c gtk+-3.20.6/gtk/gtkrange.c
--- gtk+-3.20.6-orig/gtk/gtkrange.c	2016-05-06 04:04:00 +0900
+++ gtk+-3.20.6/gtk/gtkrange.c	2016-07-03 05:31:42 +0900
@@ -2616,7 +2616,7 @@
 
   gtk_range_update_mouse_location (range);
 
-  if (priv->mouse_location == priv->slider_gadget && !priv->zoom)
+  if (0 && priv->mouse_location == priv->slider_gadget && !priv->zoom)
     {
       GtkAllocation slider_alloc;