diff --git a/src/fr/devinsy/statoolinfos/checker/PropertyChecker.java b/src/fr/devinsy/statoolinfos/checker/PropertyChecker.java
index 98d4358..d0329f3 100644
--- a/src/fr/devinsy/statoolinfos/checker/PropertyChecker.java
+++ b/src/fr/devinsy/statoolinfos/checker/PropertyChecker.java
@@ -158,7 +158,7 @@ public class PropertyChecker
         this.serviceRules.add("service.legal.url", URL, PropertyMode.WISHED);
         this.serviceRules.add("service.guide.user", URL, PropertyMode.WISHED);
         this.serviceRules.add("service.guide.technical", URL, PropertyMode.WISHED);
-        this.serviceRules.add("service.startdate", DATE, PropertyMode.WISHED);
+        this.serviceRules.add("service.startdate", DATE, PropertyMode.MANDATORY);
         this.serviceRules.add("service.enddate", DATE, PropertyMode.OPTIONAL);
         this.serviceRules.add("service.status.level", "^(OK|WARNING|ALERT|ERROR|OVER|VOID)$", PropertyMode.MANDATORY);
         this.serviceRules.add("service.status.description", STRING, PropertyMode.OPTIONAL);