diff --git a/addons/base/static/src/css/base.css b/addons/base/static/src/css/base.css
index cd420ea8c0d..46364c4fa1d 100644
--- a/addons/base/static/src/css/base.css
+++ b/addons/base/static/src/css/base.css
@@ -870,6 +870,9 @@ label.error {
 .openerp .oe_forms input[type="text"], .openerp .oe_forms input[type="password"], .openerp .oe_forms select, .openerp .oe_forms .button {
     height: 22px;
 }
+.openerp .oe_forms input.field_datetime {
+    min-width: 11em;
+}
 .openerp .oe_forms .button {
     color: #4c4c4c;
     white-space: nowrap;