diff --git a/sdrgui/gui/glspectrumgui.cpp b/sdrgui/gui/glspectrumgui.cpp
index 8fa7e9526..fd0d9390d 100644
--- a/sdrgui/gui/glspectrumgui.cpp
+++ b/sdrgui/gui/glspectrumgui.cpp
@@ -51,7 +51,7 @@ GLSpectrumGUI::GLSpectrumGUI(QWidget* parent) :
     ui->verticalLayout->removeItem(ui->Line3Layout);
     ui->verticalLayout->removeItem(ui->Line2Layout);
     ui->verticalLayout->removeItem(ui->Line1Layout);
-    FlowLayout *flowLayout = new FlowLayout(this, 1, 1, 1);
+    FlowLayout *flowLayout = new FlowLayout(nullptr, 1, 1, 1);
     flowLayout->addItem(ui->Line1Layout);
     flowLayout->addItem(ui->Line2Layout);
     flowLayout->addItem(ui->Line3Layout);