--- a/libidav/resource.c	Sat Jan 24 13:56:19 2026 +0100
+++ b/libidav/resource.c	Sun Jan 25 17:53:31 2026 +0100
@@ -761,7 +761,7 @@
     data->length = 0;
 }
 
-void dav_set_content_data(DavResource *res, char *content, size_t length) {
+void dav_set_content_data(DavResource *res, const char *content, size_t length) {
     DavSession *sn = res->session;
     DavResourceData *data = res->data;
     data->content = dav_session_malloc(sn, length);