diff --git a/Makefile.PL b/Makefile.PL
index ebcf8ab..1eeaa55 100644
--- a/Makefile.PL
+++ b/Makefile.PL
@@ -28,6 +28,7 @@ WriteMakefile(
     ABSTRACT       => 'Flexible smtpd daemon written in Perl',
     AUTHOR         => 'Ask Bjoern Hansen <ask@develooper.com>',
     EXE_FILES      => [qw(qpsmtpd qpsmtpd-forkserver qpsmtpd-prefork qpsmtpd-async)],
+    clean          => { FILES => [ '*.bak' ], },
 );
 
 sub MY::libscan {