diff -r 604e7e335b3b -r 2e15ff88a0ab libidav/utils.h
--- a/libidav/utils.h	Sun Feb 04 15:58:07 2018 +0100
+++ b/libidav/utils.h	Sun Apr 01 12:40:48 2018 +0200
@@ -68,7 +68,7 @@
 char* util_url_path(char *url);
 char* util_url_decode(DavSession *sn, char *url);
 char* util_resource_name(char *url);
-char* util_concat_path(char *url_base, char *path);
+char* util_concat_path(const char *url_base, const char *path);
 char* util_get_url(DavSession *sn, char *href);
 void util_set_url(DavSession *sn, char *href);