diff --git a/main.go b/main.go
index 70fad65..9de5f3a 100644
--- a/main.go
+++ b/main.go
@@ -265,7 +265,7 @@ func (server *Server) init() error {
 		return err
 	}
 
-	pair, _, err := server.kv.Get(path+"/attribute=objectClass", nil)
+	pair, _, err := server.kv.Get(path+"/attribute="+ATTR_OBJECTCLASS, nil)
 	if err != nil {
 		return err
 	}
@@ -275,8 +275,8 @@ func (server *Server) init() error {
 	}
 
 	base_attributes := Entry{
-		"objectClass":           []string{"top", "dcObject", "organization"},
-		"structuralObjectClass": []string{"organization"},
+		ATTR_OBJECTCLASS:        []string{"top", "dcObject", "organization"},
+		"structuralobjectclass": []string{"organization"},
 		ATTR_CREATORSNAME:       []string{server.config.Suffix},
 		ATTR_CREATETIMESTAMP:    []string{genTimestamp()},
 		ATTR_ENTRYUUID:          []string{genUuid()},
@@ -302,11 +302,11 @@ func (server *Server) init() error {
 
 	admin_dn := "cn=admin," + server.config.Suffix
 	admin_attributes := Entry{
-		"objectClass":           []string{"simpleSecurityObject", "organizationalRole"},
+		ATTR_OBJECTCLASS:        []string{"simpleSecurityObject", "organizationalRole"},
 		"displayname":           []string{"LDAP administrator"},
 		"description":           []string{"Administrator account automatically created by Bottin"},
 		"cn":                    []string{"admin"},
-		"structuralObjectClass": []string{"organizationalRole"},
+		"structuralobjectclass": []string{"organizationalRole"},
 		ATTR_USERPASSWORD:       []string{admin_pass_hash},
 		ATTR_CREATORSNAME:       []string{server.config.Suffix},
 		ATTR_CREATETIMESTAMP:    []string{genTimestamp()},