diff --git a/server/methods/loadMissedMessages.coffee b/server/methods/loadMissedMessages.coffee
index fcfab542453..0503653a8e5 100644
--- a/server/methods/loadMissedMessages.coffee
+++ b/server/methods/loadMissedMessages.coffee
@@ -2,7 +2,7 @@ Meteor.methods
 	loadMissedMessages: (rid, start) ->
 
 		check rid, String
-		check start, Number
+		check start, Date
 
 		if not Meteor.userId()
 			throw new Meteor.Error 'error-invalid-user', 'Invalid user', { method: 'loadMissedMessages' }