diff --git a/src/gui/PopUpWidget.cxx b/src/gui/PopUpWidget.cxx
index 766cb0c87..2d33a176f 100644
--- a/src/gui/PopUpWidget.cxx
+++ b/src/gui/PopUpWidget.cxx
@@ -39,6 +39,9 @@ PopUpWidget::PopUpWidget(GuiObject* boss, const GUI::Font& font,
   _textcolor = kTextColor;
   _textcolorhi = kTextColor;  // do not highlight the label
 
+  setTextFilter([](char c) {
+    return isprint(c) && c != '\"' || c == '\x1c' || c == '\x1d'; // DEGREE || ELLIPSIS
+  });
   setEditable(false);
 
   if(!_label.empty() && _labelWidth == 0)