diff --git a/gtk/gtkrange.c b/gtk/gtkrange.c
index 78736871cc..16e78f16d3 100644
--- a/gtk/gtkrange.c
+++ b/gtk/gtkrange.c
@@ -3059,7 +3059,7 @@ _gtk_range_get_wheel_delta (GtkRange       *range,
     }
   else if (gdk_event_get_scroll_direction ((GdkEvent *) event, &direction))
     {
-      if (direction == GDK_SCROLL_UP ||
+      if (direction == GDK_SCROLL_DOWN ||
           direction == GDK_SCROLL_LEFT)
         delta = - scroll_unit;
       else