diff --git a/lib/sf/account.rb b/lib/sf/account.rb
index 113d5c7..5fea935 100644
--- a/lib/sf/account.rb
+++ b/lib/sf/account.rb
@@ -138,7 +138,7 @@ def self.cert_service_subscribers
         Supporting_Institution__r.InCommon_Participant_Type__c,
         Supporting_Institution__r.InCommon_Weblink__c
         from Service_Institution__c where Service__r.Name = \'InCommon Certificate Service\'
-                               and (Service_End_Date__c = null or Service_End_Date__c ='')
+                               and Service_End_Date__c = null
                                and (Type_of_Support__c = 'Subscriber' or Type_of_Support__c = 'Subscriber Parent')
                                and Do_Not_Publish__c <> true")
     build_collection sobjects.map(&:Supporting_Institution__r) unless sobjects.blank?