diff --git a/lib/tasks/redmine.rake b/lib/tasks/redmine.rake
index c8d35af..c9ee517 100644
--- a/lib/tasks/redmine.rake
+++ b/lib/tasks/redmine.rake
@@ -68,7 +68,8 @@ DESC
     tables = ActiveRecord::Base.connection.tables.sort - %w(schema_migrations plugin_schema_info)
 
     if (tables - target_tables).any?
-      abort "The following table(s) are missing from the target database: #{(tables - target_tables).join(', ')}"
+      list = (tables - target_tables).map {|table| "* #{table}"}.join("\n")
+      abort "The following table(s) are missing from the target database:\n#{list}"
     end
 
     tables.each do |table_name|