diff --git a/addons/report/views/base_config_settings_views.xml b/addons/report/views/base_config_settings_views.xml
index 5e2766736f7..2d15525fcf4 100644
--- a/addons/report/views/base_config_settings_views.xml
+++ b/addons/report/views/base_config_settings_views.xml
@@ -9,7 +9,7 @@
                 <group name="report" position="inside">
                     <label for="paperformat_id"/>
                     <div>
-                        <field name="paperformat_id" class="oe_inline"/>
+                        <field name="paperformat_id" class="oe_inline" required="1"/>
                         <button name="%(action_report_internalpreview)d" string="Preview Internal Report" type="action"/>
                         <button name="%(action_report_externalpreview)d" string="Preview External Report" type="action"/>
                         <button name="edit_external_header" string="Edit external header" type="object" class="oe_link"/>