diff --git a/gui/ecp5/mainwindow.cc b/gui/ecp5/mainwindow.cc
index aa2911ea..fe2f9e57 100644
--- a/gui/ecp5/mainwindow.cc
+++ b/gui/ecp5/mainwindow.cc
@@ -154,6 +154,7 @@ void MainWindow::open_lpf()
         if (ctx->applyLPF(fileName.toStdString(), in)) {
             log("Loading LPF successful.\n");
             actionPack->setEnabled(true);
+            actionLoadLPF->setEnabled(false);
         } else {
             actionLoadLPF->setEnabled(true);
             log("Loading LPF failed.\n");