diff --git a/process/ldap/update_group.pl b/process/ldap/update_group.pl
index 3ef58f7..efc6b84 100644
--- a/process/ldap/update_group.pl
+++ b/process/ldap/update_group.pl
@@ -131,13 +131,13 @@ sub user_update($$)
     if ($args->{param}{l}) {
 	LDAP::update_attribute($ldap, $dn, "l", $args->{param}{l});
     } else {
-	LDAP::delete_attribute($ldap, $dn, "l");
+	LDAP::flush_attribute($ldap, $dn, "l");
     }
 
     if ($args->{param}{mail}) {
 	LDAP::update_attribute($ldap, $dn, "mail", $args->{param}{mail});
     } else {
-	LDAP::delete_attribute($ldap, $dn, "mail");
+	LDAP::flush_attribute($ldap, $dn, "mail");
     }
 
     if ($args->{param}{postalAddress}) {
@@ -145,7 +145,7 @@ sub user_update($$)
     } elsif ($args->{param}{postaladdress}) {
 	LDAP::update_attribute($ldap, $dn, "postalAddress", $args->{param}{postaladdress});
     } else {
-	LDAP::delete_attribute($ldap, $dn, "postalAddress");
+	LDAP::flush_attribute($ldap, $dn, "postalAddress");
     }
 
     if ($args->{param}{postalCode}) {
@@ -153,13 +153,13 @@ sub user_update($$)
     } elsif ($args->{param}{postalcode}) {
 	LDAP::update_attribute($ldap, $dn, "postalCode", $args->{param}{postalcode});
     } else {
-	LDAP::delete_attribute($ldap, $dn, "postalCode");
+	LDAP::flush_attribute($ldap, $dn, "postalCode");
     }
 
     if ($args->{param}{sn}) {
 	LDAP::update_attribute($ldap, $dn, "sn", $args->{param}{sn});
     } else {
-	LDAP::delete_attribute($ldap, $dn, "sn");
+	LDAP::flush_attribute($ldap, $dn, "sn");
     }
 
     if ($args->{param}{telephoneNumber}) {
@@ -167,7 +167,7 @@ sub user_update($$)
     } elsif ($args->{param}{telephonenumber}) {
 	LDAP::update_attribute($ldap, $dn, "telephoneNumber", $args->{param}{telephonenumber});
     } else {
-	LDAP::delete_attribute($ldap, $dn, "telephoneNumber");
+	LDAP::flush_attribute($ldap, $dn, "telephoneNumber");
     }
 
     if ($args->{param}{strongAuthKey}) {
@@ -175,19 +175,19 @@ sub user_update($$)
     } elsif ($args->{param}{strongauthkey}) {
 	LDAP::update_attribute($ldap, $dn, "strongAuthKey", $args->{param}{strongauthkey});
     } else {
-	LDAP::delete_attribute($ldap, $dn, "strongAuthKey");
+	LDAP::flush_attribute($ldap, $dn, "strongAuthKey");
     }
 
     if ($args->{param}{c}) {
 	LDAP::update_attribute($ldap, $dn, "c", $args->{param}{c});
     } else {
-	LDAP::delete_attribute($ldap, $dn, "c");
+	LDAP::flush_attribute($ldap, $dn, "c");
     }
 
     if ($args->{param}{title}) {
 	LDAP::update_attribute($ldap, $dn, "title", $args->{param}{title});
     } else {
-	LDAP::delete_attribute($ldap, $dn, "title");
+	LDAP::flush_attribute($ldap, $dn, "title");
     }
 
     if ($args->{param}{intraTheme}) {
@@ -195,13 +195,13 @@ sub user_update($$)
     } elsif ($args->{param}{intratheme}) {
 	LDAP::update_attribute($ldap, $dn, "intraTheme", $args->{param}{intratheme});
     } else {
-	LDAP::delete_attribute($ldap, $dn, "intraTheme");
+	LDAP::flush_attribute($ldap, $dn, "intraTheme");
     }
 
     if ($args->{param}{birthdate}) {
 	LDAP::update_attribute($ldap, $dn, "birthdate", $args->{param}{birthdate});
     } else {
-	LDAP::delete_attribute($ldap, $dn, "birthdate");
+	LDAP::flush_attribute($ldap, $dn, "birthdate");
     }
 }