diff --git a/app/models/issue.rb b/app/models/issue.rb
index 707c458..3a063c9 100644
--- a/app/models/issue.rb
+++ b/app/models/issue.rb
@@ -810,7 +810,7 @@ class Issue < ActiveRecord::Base
   # Users the issue can be assigned to
   def assignable_users
     users = project.assignable_users.to_a
-    users << author if author
+    users << author if (author && !author.anonymous?)
     users << assigned_to if assigned_to
     users.uniq.sort
   end