diff --git a/gtk2_ardour/automation_line.cc b/gtk2_ardour/automation_line.cc
index d51a4fe1eb..fad69fd62d 100644
--- a/gtk2_ardour/automation_line.cc
+++ b/gtk2_ardour/automation_line.cc
@@ -1212,7 +1212,7 @@ AutomationLine::view_to_model_coord_y (double& y) const
 	} else if (alist->parameter().type() == PluginAutomation) {
 		y = y * (double)(alist->get_max_y()- alist->get_min_y()) + alist->get_min_y();
 	} else {
-		y = (int)(y * alist->parameter().max());
+		y = rint (y * alist->parameter().max());
 	}
 }