diff --git a/gtk2_ardour/processor_box.cc b/gtk2_ardour/processor_box.cc
index 7d2e39639b..476bb73612 100644
--- a/gtk2_ardour/processor_box.cc
+++ b/gtk2_ardour/processor_box.cc
@@ -213,6 +213,7 @@ void
 ProcessorEntry::set_enum_width (Width w)
 {
 	_width = w;
+	_button.set_text (name (_width));
 }
 
 void