diff --git a/libcontainer/user/user.go b/libcontainer/user/user.go
index 110860b4e..5b013eb3e 100644
--- a/libcontainer/user/user.go
+++ b/libcontainer/user/user.go
@@ -16,9 +16,6 @@ const (
 )
 
 var (
-	// The current operating system does not provide the required data for user lookups.
-	ErrUnsupported = errors.New("user lookup: operating system does not provide passwd-formatted data")
-
 	// No matching entries found in file.
 	ErrNoPasswdEntries = errors.New("no matching entries in passwd file")
 	ErrNoGroupEntries  = errors.New("no matching entries in group file")