diff --git a/APPL/RES/res_edit_rsv_ruimte.asp b/APPL/RES/res_edit_rsv_ruimte.asp
index 48932aeeeb..0ee7a9823a 100644
--- a/APPL/RES/res_edit_rsv_ruimte.asp
+++ b/APPL/RES/res_edit_rsv_ruimte.asp
@@ -1161,7 +1161,7 @@ FCLTHeader.Requires({plugins: ["jQuery", "kenmerk"],
           <tr><td class="label"><label for='sel_room'><%=L("lcl_room")%>:</label></td>
     	      <td><div id='req_sel_room'>
     	            <input type="text" id="sel_room"
-    	                   class="<%=!rrr.res_ruimte_extern? "button fldresroomedit" : ""%> fldresroom required"
+    	                   class="<%=!rrr.res_ruimte_extern? "button fldresroomedit required" : ""%> fldresroom"
     	                   readonly
     	                   <% if (!rrr.res_ruimte_extern) { %> onclick="FindAvailableRooms()" <% } %>
     	                   value="<%=L("lcl_res_select_room")%>"