diff --git a/gui/qt/qrtextedit.py b/gui/qt/qrtextedit.py
index 42d999c00d4d..9e7e3ba6cdf6 100644
--- a/gui/qt/qrtextedit.py
+++ b/gui/qt/qrtextedit.py
@@ -56,6 +56,8 @@ def qr_input(self):
         except BaseException as e:
             self.show_error(str(e))
             data = ''
+        if not data:
+            data = ''
         self.setText(data)
         return data