diff --git a/addons/web/static/src/css/base.css b/addons/web/static/src/css/base.css
index 236b038bab8..1b816cd7945 100644
--- a/addons/web/static/src/css/base.css
+++ b/addons/web/static/src/css/base.css
@@ -86,11 +86,13 @@
    */
 }
 .openerp.openerp_webclient_container {
+  height: 95%;
   height: calc(100% - 34px);
   overflow: auto;
 }
 @media (max-width: 768px) {
   .openerp.openerp_webclient_container {
+    height: 90%;
     height: calc(100% - 52px);
   }
 }
diff --git a/addons/web/static/src/css/base.sass b/addons/web/static/src/css/base.sass
index 7343d1e0406..2dc158f9e33 100644
--- a/addons/web/static/src/css/base.sass
+++ b/addons/web/static/src/css/base.sass
@@ -201,10 +201,12 @@ $sheet-padding: 16px
     font-size: 13px
     background: white
     &.openerp_webclient_container
+        height: 95% // fallback for browsers without support for calc()
         height: calc(100% - 34px)
         overflow: auto
     @media (max-width: 768px)
         &.openerp_webclient_container
+            height: 90% // fallback for browsers without support for calc()
             height: calc(100% - 52px)
     // }}}
     //Placeholder style{{{