diff --git a/gui/ecp5/mainwindow.cc b/gui/ecp5/mainwindow.cc
index e5a5f1ba..4fc8be16 100644
--- a/gui/ecp5/mainwindow.cc
+++ b/gui/ecp5/mainwindow.cc
@@ -126,10 +126,6 @@ void MainWindow::new_proj()
     }
 }
 
-void MainWindow::open_proj() {}
-
-bool MainWindow::save_proj() { return false; }
-
 void MainWindow::load_base_config(std::string filename)
 {
     disableActions();
diff --git a/gui/ecp5/mainwindow.h b/gui/ecp5/mainwindow.h
index 9460913c..aa1af17b 100644
--- a/gui/ecp5/mainwindow.h
+++ b/gui/ecp5/mainwindow.h
@@ -42,8 +42,6 @@ class MainWindow : public BaseMainWindow
 
   protected Q_SLOTS:
     virtual void new_proj();
-    virtual void open_proj();
-    virtual bool save_proj();
     void newContext(Context *ctx);
     void open_base();
     void save_config();
diff --git a/gui/generic/mainwindow.cc b/gui/generic/mainwindow.cc
index 01eeb4ef..76837ed4 100644
--- a/gui/generic/mainwindow.cc
+++ b/gui/generic/mainwindow.cc
@@ -49,8 +49,4 @@ void MainWindow::createMenu() {}
 
 void MainWindow::new_proj() {}
 
-void MainWindow::open_proj() {}
-
-bool MainWindow::save_proj() { return false; }
-
 NEXTPNR_NAMESPACE_END
diff --git a/gui/generic/mainwindow.h b/gui/generic/mainwindow.h
index 375436b6..a4ce9958 100644
--- a/gui/generic/mainwindow.h
+++ b/gui/generic/mainwindow.h
@@ -37,8 +37,6 @@ class MainWindow : public BaseMainWindow
 
   protected Q_SLOTS:
     virtual void new_proj();
-    virtual void open_proj();
-    virtual bool save_proj();
     void newContext(Context *ctx);
 };