--- a/gtk/gtknotebook.c
+++ b/gtk/gtknotebook.c
@@ -3191,9 +3191,8 @@
 }
 
 static void
-gtk_notebook_arrow_drag_leave (GtkDropTarget *target,
-                               GdkDrop       *drop,
-                               GtkNotebook   *notebook)
+gtk_notebook_arrow_drag_leave (GtkDropControllerMotion *motion,
+                               GtkNotebook             *notebook)
 {
   stop_scrolling (notebook);
 }