diff --git a/gtk2_ardour/ardour3_widget_list.rc b/gtk2_ardour/ardour3_widget_list.rc
index 8c902aff01..45a9fef411 100644
--- a/gtk2_ardour/ardour3_widget_list.rc
+++ b/gtk2_ardour/ardour3_widget_list.rc
@@ -280,6 +280,8 @@ widget "*monitor section invert" style:highest "monitor_invert_button"
 widget "*monitor section cut" style:highest "monitor_mute_button"
 widget "*monitor section dim" style:highest "monitor_dim_button"
 widget "*monitor section mono" style:highest "monitor_mono_button"
+widget "*monitor solo exclusive" style:highest "monitor_mono_button"
+widget "*monitor solo override" style:highest "monitor_mono_button"
 widget "*MonitorIsoAlert" style:highest "monitor_iso_button"
 widget "*MonitorIsoAlert*" style:highest "monitor_iso_button"
 widget "*BypassButton" style:highest "bright_when_active"