diff --git a/src/gui_qt/fit/function_creation_dialog.py b/src/gui_qt/fit/function_creation_dialog.py
index 7ce0388..9dddd49 100644
--- a/src/gui_qt/fit/function_creation_dialog.py
+++ b/src/gui_qt/fit/function_creation_dialog.py
@@ -215,7 +215,7 @@ class KwargsWidget(QtWidgets.QWidget):
         for i in range(self.choices.count()):
             kwargs.append(self.choices.widget(i).get_strings())
         if kwargs:
-            return f"    choices = {', '.join(kwargs)}\n"
+            return f"    choices = [{', '.join(kwargs)}]\n"
         else:
             return ''