diff --git a/gtk2_ardour/mixer_strip.cc b/gtk2_ardour/mixer_strip.cc
index ff3fd54624..adce954a91 100644
--- a/gtk2_ardour/mixer_strip.cc
+++ b/gtk2_ardour/mixer_strip.cc
@@ -611,7 +611,7 @@ MixerStrip::set_width_enum (Width w, void* owner)
 		solo_isolated_led->set_text (_("iso"));
 		solo_safe_led->set_text (_("lock"));
 
-		Gtkmm2ext::set_size_request_to_display_given_text (name_button, "long", 2, 2);
+		Gtkmm2ext::set_size_request_to_display_given_text (name_button, longest_label.c_str(), 2, 2);
 		set_size_request (-1, -1);
 		break;
 
@@ -635,7 +635,7 @@ MixerStrip::set_width_enum (Width w, void* owner)
 		solo_isolated_led->set_text (_("i"));
 		solo_safe_led->set_text (_("L"));
 
-		Gtkmm2ext::set_size_request_to_display_given_text (name_button, longest_label.c_str(), 2, 2);
+		Gtkmm2ext::set_size_request_to_display_given_text (name_button, "long", 2, 2);
 		set_size_request (max (50, gpm.get_gm_width()), -1);
 		break;
 	}