diff --git a/addons/web/static/src/less/form_view.less b/addons/web/static/src/less/form_view.less
index be931ccbc0c..c0bb80b7a12 100644
--- a/addons/web/static/src/less/form_view.less
+++ b/addons/web/static/src/less/form_view.less
@@ -359,13 +359,13 @@
             }
         }
 
-        :not(.o_row) > .o_field_widget,
+        :not(.o_row):not(.o_data_cell) > .o_field_widget,
         .o_row > .o_field_widget:last-child { // Note: this does not take care
                                               // of an invisible last-child but
                                               // it does not really matter
             // Makes extra buttons (e.g. m2o external button) overflow on the
             // right padding of the parent element
-            .o_input_dropdown {
+            > .o_input_dropdown {
                 .o-flex(1, 0, auto);
             }
         }