diff --git a/application/Espo/Modules/Crm/Resources/metadata/entityDefs/Task.json b/application/Espo/Modules/Crm/Resources/metadata/entityDefs/Task.json
index 03106f7920..af88bb7534 100644
--- a/application/Espo/Modules/Crm/Resources/metadata/entityDefs/Task.json
+++ b/application/Espo/Modules/Crm/Resources/metadata/entityDefs/Task.json
@@ -17,7 +17,8 @@
             "type": "datetime"
         },
         "dateEnd": {
-            "type": "datetime"
+            "type": "datetime",
+            "after": "dateStart"
         },
         "isOverdue": {
         	"type": "base",