--- a/libidav/methods.c	Tue Dec 30 21:39:38 2025 +0100
+++ b/libidav/methods.c	Wed Dec 31 16:41:16 2025 +0100
@@ -1078,7 +1078,7 @@
         free(ltheader);
     }
     //cxstring deststr = ucx_sprintf("Destination: %s", dest);
-    cxmutstr deststr = cx_strcat(2, cx_str("Destination: "), cx_str(dest));
+    cxmutstr deststr = cx_strcat(CX_NULLSTR, 2, cx_str("Destination: "), cx_str(dest));
     headers = curl_slist_append(headers, deststr.ptr);
     if(override) {
         headers = curl_slist_append(headers, "Overwrite: T");