diff --git a/addons/base/static/src/css/base.css b/addons/base/static/src/css/base.css
index 234bf2a37d9..dbce531edce 100644
--- a/addons/base/static/src/css/base.css
+++ b/addons/base/static/src/css/base.css
@@ -793,7 +793,8 @@ background: linear-gradient(top, #ffffff 0%,#d8d8d8 11%,#afafaf 86%,#333333 91%,
 .openerp .separator.horizontal {
    font-weight: bold;
     border-bottom-width: 1px;
-    margin: 6px 4px 6px 1px;
+    margin: 3px 4px 3px 1px;
+    height: 15px;
 }
 .openerp td.required input, .openerp td.required select {
     background-color: #D2D2FF;