diff --git a/gtk/gtkscrollbar.c b/gtk/gtkscrollbar.c
index ed2d9bc22e..bb5076cc88 100644
--- a/gtk/gtkscrollbar.c
+++ b/gtk/gtkscrollbar.c
@@ -323,43 +323,3 @@ gtk_scrollbar_get_adjustment (GtkScrollbar  *self)
 
   return gtk_range_get_adjustment (GTK_RANGE (priv->range));
 }
-
-double
-gtk_scrollbar_get_wheel_delta (GtkScrollbar         *self,
-                               const GdkEventScroll *event)
-{
-  GtkScrollbarPrivate *priv = gtk_scrollbar_get_instance_private (self);
-  GtkAdjustment *adjustment;
-  gdouble dx, dy;
-  gdouble delta = 0;
-  gdouble page_size;
-  gdouble scroll_unit;
-  GdkScrollDirection direction;
-
-  adjustment = gtk_scrollbar_get_adjustment (self);
-  page_size = gtk_adjustment_get_page_size (adjustment);
-
-  scroll_unit = pow (page_size, 2.0 / 3.0);
-
-  if (gdk_event_get_scroll_deltas ((GdkEvent *) event, &dx, &dy))
-    {
-#ifdef GDK_WINDOWING_QUARTZ
-      scroll_unit = 1;
-#endif
-
-      if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
-        delta = - (dx ? dx : dy) * scroll_unit;
-      else
-        delta = dy * scroll_unit;
-    }
-  else if (gdk_event_get_scroll_direction ((GdkEvent *) event, &direction))
-    {
-      if (direction == GDK_SCROLL_UP ||
-          direction == GDK_SCROLL_LEFT)
-        delta = - scroll_unit;
-      else
-        delta = scroll_unit;
-    }
-
-  return delta;
-}
diff --git a/gtk/gtkscrollbar.h b/gtk/gtkscrollbar.h
index b76d635a50..1926e8f355 100644
--- a/gtk/gtkscrollbar.h
+++ b/gtk/gtkscrollbar.h
@@ -73,9 +73,6 @@ void           gtk_scrollbar_set_adjustment (GtkScrollbar  *self,
                                              GtkAdjustment *adjustment);
 GDK_AVAILABLE_IN_ALL
 GtkAdjustment *gtk_scrollbar_get_adjustment (GtkScrollbar  *self);
-GDK_AVAILABLE_IN_ALL
-double         gtk_scrollbar_get_wheel_delta (GtkScrollbar         *self,
-                                              const GdkEventScroll *event);
 
 G_END_DECLS