diff --git a/cleaner/cleaner.go b/cleaner/cleaner.go
index 9bce4c03c6b1734e90d2b6307938dc6880ab818d..5937718b75af237bfa369cc6b6c3fc390cf1547c 100644
--- a/cleaner/cleaner.go
+++ b/cleaner/cleaner.go
@@ -7,7 +7,7 @@ import (
 	"syscall"
 )
 
-type t func() error
+type Cleaner func() error
 
 var cleaners []t
 var inactive bool