diff --git a/town.go b/town.go
index cf8f9ba..479c80a 100644
--- a/town.go
+++ b/town.go
@@ -9,7 +9,7 @@ import (
 
 const adminGroup = "admin"
 
-func IsAdmin(u os.User) (bool, error) {
+func IsAdmin(u user.User) (bool, error) {
 	adminGroup, err := user.LookupGroup(adminGroup)
 	if err != nil {
 		return false, fmt.Errorf("failed to get admin group info: %w", err)
@@ -34,7 +34,7 @@ func SendLocalEmail(username, subject, body string) error {
 	cmd.Stdin = bytes.NewBufferString(body)
 
 	if err := cmd.Run(); err != nil {
-		return fmt.Errof("failed to send local email: %w", err)
+		return fmt.Errorf("failed to send local email: %w", err)
 	}
 
 	return nil