diff --git a/src/calibre/gui2/convert/docx_output.py b/src/calibre/gui2/convert/docx_output.py
index e1ac7b7c7d..932ca92d64 100644
--- a/src/calibre/gui2/convert/docx_output.py
+++ b/src/calibre/gui2/convert/docx_output.py
@@ -27,7 +27,7 @@ class PluginWidget(Widget):
             self.opt_docx_page_size.addItem(x)
 
         self.initialize_options(get_option, get_help, db, book_id)
-        self.layout().setFieldGrowthPolicy(self.layout().ExpandingFieldsGrow)
+        self.layout().setFieldGrowthPolicy(QFormLayout.FieldGrowthPolicy.ExpandingFieldsGrow)
 
     def setupUi(self, *a):
         self.l = l = QFormLayout(self)
diff --git a/src/calibre/gui2/convert/pdf_output.py b/src/calibre/gui2/convert/pdf_output.py
index 5c98b19442..3bb98534a6 100644
--- a/src/calibre/gui2/convert/pdf_output.py
+++ b/src/calibre/gui2/convert/pdf_output.py
@@ -40,8 +40,8 @@ class PluginWidget(Widget, Ui_Form):
             self.opt_pdf_standard_font.addItem(x)
 
         self.initialize_options(get_option, get_help, db, book_id)
-        self.layout().setFieldGrowthPolicy(self.layout().ExpandingFieldsGrow)
-        self.template_box.layout().setFieldGrowthPolicy(self.layout().AllNonFixedFieldsGrow)
+        self.layout().setFieldGrowthPolicy(QFormLayout.FieldGrowthPolicy.ExpandingFieldsGrow)
+        self.template_box.layout().setFieldGrowthPolicy(QFormLayout.FieldGrowthPolicy.AllNonFixedFieldsGrow)
         self.profile_size_toggled()
 
     def profile_size_toggled(self):