diff --git a/addons/web_kanban/static/src/css/kanban.css b/addons/web_kanban/static/src/css/kanban.css
index 2eac8370487..bac06c2fa53 100644
--- a/addons/web_kanban/static/src/css/kanban.css
+++ b/addons/web_kanban/static/src/css/kanban.css
@@ -103,6 +103,7 @@
 }
 .openerp .oe_kanban_view.oe_kanban_grouped .oe_kanban_group_header {
   width: 1%;
+  height: 1%;
 }
 .openerp .oe_kanban_view .oe_form .oe_kanban_column {
   padding: 0px;
diff --git a/addons/web_kanban/static/src/css/kanban.sass b/addons/web_kanban/static/src/css/kanban.sass
index 84de3e32842..ff8feffa5d5 100644
--- a/addons/web_kanban/static/src/css/kanban.sass
+++ b/addons/web_kanban/static/src/css/kanban.sass
@@ -129,6 +129,7 @@
     &.oe_kanban_grouped 
         .oe_kanban_group_header
             width: 1%
+            height: 1%
 
     .oe_form
         .oe_kanban_column