diff --git a/APPL/PDA/default.css b/APPL/PDA/default.css
index 2ff3509adb..74f51092e2 100644
--- a/APPL/PDA/default.css
+++ b/APPL/PDA/default.css
@@ -99,10 +99,17 @@ label.ed {font-weight: lighter; color: #d14b1c;}
 .moreinfo input {
     font-weight: bold;
     color: #000 !important;
-}
-
-.missing { background-color: #FFD0D0!important; }
-.attention {color: #E63600 !important;}
+    }
+.required  {
+    border: 1px solid #D14B1C!important;
+    }
+.missing,
+.suggest.missing {
+    background-color: #FFD0D0!important;
+    }
+.attention {
+    color: #E63600 !important;
+    }
 
 .resruimte .ui-page,
 .resruimte .ui-content {