diff --git a/gtk/gtktreeview.c b/gtk/gtktreeview.c
index d1a4bff0dc..0f47c07bee 100644
--- a/gtk/gtktreeview.c
+++ b/gtk/gtktreeview.c
@@ -2237,6 +2237,7 @@ gtk_tree_view_realize (GtkWidget *widget)
   attributes.height = allocation.height;
   attributes.event_mask = (GDK_EXPOSURE_MASK |
                            GDK_SCROLL_MASK |
+                           GDK_SMOOTH_SCROLL_MASK |
                            GDK_POINTER_MOTION_MASK |
                            GDK_ENTER_NOTIFY_MASK |
                            GDK_LEAVE_NOTIFY_MASK |