diff --git a/src/app/tape/tmainwindow.cpp b/src/app/tape/tmainwindow.cpp
index 6e915b380..0b6837344 100644
--- a/src/app/tape/tmainwindow.cpp
+++ b/src/app/tape/tmainwindow.cpp
@@ -1076,7 +1076,7 @@ void TMainWindow::SavePMSystem(int index)
 //---------------------------------------------------------------------------------------------------------------------
 void TMainWindow::Remove()
 {
-    ShowMDiagram("");
+    ShowMDiagram(QString());
     const int row = ui->tableWidget->currentRow();
 
     if (row == -1)