diff --git a/sao/src/theme/coog/sao.less b/sao/src/theme/coog/sao.less
index 8aa06c80bc2..3d7b1fe36a9 100644
--- a/sao/src/theme/coog/sao.less
+++ b/sao/src/theme/coog/sao.less
@@ -542,6 +542,12 @@ div.form-text {
     }
 }
 
+// Make selections without any options look readonly
+select:empty, select:has(> option[value="null"]):not(:has(> option:not([value="null"]))) {
+    .coog-readonly-field-mixin();
+    pointer-events:         none;
+}
+
 // flatter checkboxes
 div.form-boolean > input[type=checkbox].input-checkbox {
     box-shadow:            none;