diff --git a/liblogdiag/ld-diagram-view.c b/liblogdiag/ld-diagram-view.c
index 704678d..76afac9 100644
--- a/liblogdiag/ld-diagram-view.c
+++ b/liblogdiag/ld-diagram-view.c
@@ -558,7 +558,7 @@ ld_diagram_view_init (LdDiagramView *self)
 	gtk_widget_add_events (GTK_WIDGET (self),
 		GDK_POINTER_MOTION_MASK | GDK_POINTER_MOTION_HINT_MASK
 		| GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK
-		| GDK_LEAVE_NOTIFY_MASK);
+		| GDK_SCROLL_MASK | GDK_LEAVE_NOTIFY_MASK);
 
 	gtk_drag_dest_set (GTK_WIDGET (self), 0, &target, 1, GDK_ACTION_COPY);
 }