diff --git a/app/models/member.rb b/app/models/member.rb
index 4206ba446..f54981867 100644
--- a/app/models/member.rb
+++ b/app/models/member.rb
@@ -26,6 +26,7 @@ class Member < ActiveRecord::Base
   validates_uniqueness_of :user_id, :scope => :project_id
   validate :validate_role
 
+  before_destroy :set_issue_category_nil
   after_destroy :unwatch_from_permission_change
 
   def name
@@ -66,7 +67,7 @@ class Member < ActiveRecord::Base
     end
   end
 
-  def before_destroy
+  def set_issue_category_nil
     if user
       # remove category based auto assignments for this member
       IssueCategory.update_all "assigned_to_id = NULL", ["project_id = ? AND assigned_to_id = ?", project.id, user.id]