diff --git a/org.adempiere.ui.zk/theme/default/css/theme.css.dsp b/org.adempiere.ui.zk/theme/default/css/theme.css.dsp
index d2acecfc17..c0f58c231f 100644
--- a/org.adempiere.ui.zk/theme/default/css/theme.css.dsp
+++ b/org.adempiere.ui.zk/theme/default/css/theme.css.dsp
@@ -1050,7 +1050,7 @@ tr.z-group {
 	font-family: Helvetica,Arial,sans-serif;
 }
 
-.z-textbox-readonly, .z-intbox-readonly, .z-longbox-readonly, .z-doublebox-readonly, .z-decimalbox-readonly {
+.z-textbox-readonly, .z-intbox-readonly, .z-longbox-readonly, .z-doublebox-readonly, .z-decimalbox-readonly, .z-datebox-readonly {
 	background-color: #F0F0F0;
 }