diff --git a/addons/web/static/src/css/base.css b/addons/web/static/src/css/base.css
index e9a1bed9d70df4fe9d03973035cc7ac3f7c528e9..b7a42f7de60e4f9c825fd0c39c3ffba7bc1ca564 100644
--- a/addons/web/static/src/css/base.css
+++ b/addons/web/static/src/css/base.css
@@ -3361,6 +3361,9 @@ body.oe_single_form .oe_single_form_container {
   height: 18px;
   font-size: 20px;
 }
+.modal .modal-body {
+  overflow-x: auto;
+}
 .modal .modal-footer {
   text-align: left;
 }
@@ -3369,7 +3372,6 @@ body.oe_single_form .oe_single_form_container {
 }
 .modal .oe_act_window.modal-body {
   padding: 0;
-  overflow-x: auto;
 }
 
 .ui-datepicker {
diff --git a/addons/web/static/src/css/base.sass b/addons/web/static/src/css/base.sass
index bff2928b57097bee166188072521cceeeaf2e298..f330336211fa243448109de623c491493011874f 100644
--- a/addons/web/static/src/css/base.sass
+++ b/addons/web/static/src/css/base.sass
@@ -2751,13 +2751,14 @@ body.oe_single_form
         padding: 1px
         height: 18px
         font-size: 20px
+    .modal-body
+        overflow-x: auto
     .modal-footer
         text-align: left
     .oe_button
         margin: 0 4px 0 0
     .oe_act_window.modal-body
         padding: 0
-        overflow-x: auto
 
 .ui-datepicker
     z-index: 1500 !important