diff --git a/lib/issues_save_hook_listener.rb b/lib/issues_save_hook_listener.rb
index e5479c3..2f9f5a5 100644
--- a/lib/issues_save_hook_listener.rb
+++ b/lib/issues_save_hook_listener.rb
@@ -55,11 +55,14 @@ class IssuesSaveHookListener < Redmine::Hook::ViewListener
    # Called After Issue Saved
   def controller_issues_edit_after_save(context={})
     issue = context[:issue]
-    employee_id = issue.assigned_to.qbo_employee_id
+    
+    if issue.assigned_to
+      employee_id = issue.assigned_to.qbo_employee_id
 
-    # Check to see if we have registered with QBO and if the issue is closed.
-    # If so then we need to create a new billable time activity for the customer
-    bill_time(issue, employee_id) if Qbo.first && issue.customer && issue.qbo_item && employee_id && issue.status.is_closed?
+      # Check to see if we have registered with QBO and if the issue is closed.
+      # If so then we need to create a new billable time activity for the customer
+      bill_time(issue, employee_id) if Qbo.first && issue.customer && issue.qbo_item && employee_id && issue.status.is_closed?
+    end
   end
     
   # Create billable time entries