diff --git a/app/Http/Controllers/PostMarkController.php b/app/Http/Controllers/PostMarkController.php
index 5401808119a0..6646f1724327 100644
--- a/app/Http/Controllers/PostMarkController.php
+++ b/app/Http/Controllers/PostMarkController.php
@@ -231,13 +231,13 @@ class PostMarkController extends BaseController
     {
         $invitation = false;
 
-        if($invitation = InvoiceInvitation::whereRaw('BINARY `message_id`= ?', [$message_id])->first())
+        if($invitation = InvoiceInvitation::where('message_id', $message_id)->first())
             return $invitation;
-        elseif($invitation = QuoteInvitation::whereRaw('BINARY `message_id`= ?', [$message_id])->first())
+        elseif($invitation = QuoteInvitation::where('message_id', $message_id)->first())
             return $invitation;
-        elseif($invitation = RecurringInvoiceInvitation::whereRaw('BINARY `message_id`= ?', [$message_id])->first())
+        elseif($invitation = RecurringInvoiceInvitation::where('message_id', $message_id)->first())
             return $invitation;
-        elseif($invitation = CreditInvitation::whereRaw('BINARY `message_id`= ?', [$message_id])->first())
+        elseif($invitation = CreditInvitation::where('message_id', $message_id)->first())
             return $invitation;
         else
             return $invitation;