diff --git a/src/pki/acme.go b/src/pki/acme.go
index 6f63236..82c04bc 100644
--- a/src/pki/acme.go
+++ b/src/pki/acme.go
@@ -32,10 +32,12 @@ func (u *User) Init(cfg *config.Config) (err error) {
 func (u *User) GetEntry(cfg *config.Config, domains []string) (Entry cert.Entry, err error) {
 
 	has, err := cfg.Db.Where("domains = ?", strings.Join(domains, ",")).Where(
-		"validity_end::timestamp-'? DAY'::INTERVAL >= now()", cfg.ACME.MaxDaysBefore).Where(
+		fmt.Sprintf("validity_end::timestamp-'%d DAY'::INTERVAL >= now()", cfg.ACME.MaxDaysBefore)).Where(
 		"auth_url = ?", cfg.ACME.AuthURL).Desc(
 		"id").Get(&Entry)
 
+	fmt.Println(has, err)
+
 	if !has {
 		err = fmt.Errorf("entry doesn't exists")
 	}