- ArdourButton fil_hidden_button;
- ArdourButton fil_instruments_button;
- ArdourButton fil_analysis_button;
- ArdourButton fil_utils_button;
+ ArdourWidgets::ArdourButton fil_hidden_button;
+ ArdourWidgets::ArdourButton fil_instruments_button;
+ ArdourWidgets::ArdourButton fil_analysis_button;
+ ArdourWidgets::ArdourButton fil_utils_button;