diff --git a/lib/tasks/migrate_from_mantis.rake b/lib/tasks/migrate_from_mantis.rake
index aec801004..499dc7b93 100644
--- a/lib/tasks/migrate_from_mantis.rake
+++ b/lib/tasks/migrate_from_mantis.rake
@@ -504,6 +504,9 @@ task :migrate_from_mantis => :environment do
   # Make sure bugs can refer bugs in other projects
   Setting.cross_project_issue_relations = 1 if Setting.respond_to? 'cross_project_issue_relations'
   
+  # Turn off email notifications
+  Setting.notified_events = []
+  
   MantisMigrate.establish_connection db_params
   MantisMigrate.migrate
 end
diff --git a/lib/tasks/migrate_from_trac.rake b/lib/tasks/migrate_from_trac.rake
index a63daae1a..7ee5c4ece 100644
--- a/lib/tasks/migrate_from_trac.rake
+++ b/lib/tasks/migrate_from_trac.rake
@@ -752,7 +752,10 @@ namespace :redmine do
     prompt('Trac database encoding', :default => 'UTF-8') {|encoding| TracMigrate.encoding encoding}
     prompt('Target project identifier') {|identifier| TracMigrate.target_project_identifier identifier}
     puts
-
+    
+    # Turn off email notifications
+    Setting.notified_events = []
+    
     TracMigrate.migrate
   end
 end