diff --git a/dicos/70_prometheus.xml b/dicos/70_prometheus.xml
index ba4c1ad..5f0dbd3 100644
--- a/dicos/70_prometheus.xml
+++ b/dicos/70_prometheus.xml
@@ -169,6 +169,18 @@
             <param>['Node Exporter','Port']</param>
         </check>
 
+        <check name='valid_enum' target='alRouteMatchSource'>
+            <param>['','service','severity']</param>
+        </check>
+
+        <check name='valid_enum' target='alRouteMatchRegExpSource'>
+            <param>['','service','severity']</param>
+        </check>
+
+        <check name='valid_enum' target='alSubRouteMatchSource'>
+            <param>['','service','severity']</param>
+        </check>
+
         <condition name='disabled_if_in' source='alSMTPAuth'>
             <param>non</param>
             <target type='variable'>alSMTPUser</target>