diff -r d94c4fd35c21 -r fdc2fb090cc7 libidav/webdav.h
--- a/libidav/webdav.h	Sat Oct 27 15:05:13 2018 +0200
+++ b/libidav/webdav.h	Sun Nov 04 16:35:44 2018 +0100
@@ -84,6 +84,7 @@
     DAV_SSL_ERROR,
     DAV_QL_ERROR,
     DAV_CONTENT_VERIFICATION_ERROR,
+    DAV_PRECONDITION_FAILED,
     DAV_REQUEST_ENTITY_TOO_LARGE,
     DAV_REQUEST_URL_TOO_LONG,
     DAV_PROXY_AUTH_REQUIRED,