diff -r 527d0fde484e -r de23f8881e9f libidav/session.c
--- a/libidav/session.c	Sun Mar 06 15:19:50 2016 +0100
+++ b/libidav/session.c	Mon Mar 14 11:54:55 2016 +0100
@@ -148,6 +148,7 @@
             case 404: sn->error = DAV_NOT_FOUND; break;
             case 405: sn->error = DAV_METHOD_NOT_ALLOWED; break;
             case 409: sn->error = DAV_CONFLICT; break;
+            case 423: sn->error = DAV_LOCKED; break;
         }
     } else {
         switch(c) {