diff --git a/sdrgui/gui/glscopegui.cpp b/sdrgui/gui/glscopegui.cpp
index 7ddda505e..22dd95f79 100644
--- a/sdrgui/gui/glscopegui.cpp
+++ b/sdrgui/gui/glscopegui.cpp
@@ -1654,7 +1654,7 @@ void GLScopeGUI::setDisplayMode(GLScopeSettings::DisplayMode displayMode)
     ui->verticalXY->setEnabled(nbTraces > 1);
     ui->polar->setEnabled(nbTraces > 1);
 
-    if (ui->trace->maximum() == 1)
+    if (ui->trace->maximum() == 0)
     {
         ui->onlyX->setChecked(true);
         ui->onlyX->setEnabled(false);