diff -r 07b815faa6ac -r f00d03835dd9 src/server/webdav/xml.c
--- a/src/server/webdav/xml.c	Tue Dec 30 21:44:49 2025 +0100
+++ b/src/server/webdav/xml.c	Tue Jan 13 18:09:20 2026 +0100
@@ -50,7 +50,7 @@
  * format: prefix '\0' href
  */
 static CxHashKey xml_namespace_key(CxAllocator *a, WSNamespace *ns) {
-    cxmutstr key_data = cx_strcat_a(a, 3,
+    cxmutstr key_data = cx_strcat_a(a, CX_NULLSTR, 3,
             ns->prefix ? cx_str((char*)ns->prefix) : cx_strn("\0", 1),
             cx_strn("\0", 1),
             cx_str((char*)ns->href));
@@ -321,7 +321,7 @@
         WSXmlNode *node)
 {
     CxBuffer buf;
-    if(cxBufferInit(&buf, NULL, 1024, pool_allocator(pool), CX_BUFFER_AUTO_EXTEND|CX_BUFFER_FREE_CONTENTS)) {
+    if(cxBufferInit(&buf, pool_allocator(pool), NULL, 1024, CX_BUFFER_AUTO_EXTEND|CX_BUFFER_FREE_CONTENTS)) {
         return NULL;
     }
     
@@ -519,18 +519,18 @@
     for(i=0;text[i]!='\0';i++) {
         char c = text[i];
         if(c == '&') {
-            entityref = (cxstring)CX_STR("&");
+            entityref = cx_str("&");
         } else if(type == 0) {
             if(c == '<') {
-                entityref = (cxstring)CX_STR("&lt;");
+                entityref = cx_str("&lt;");
             } else if(c == '>') {
-                entityref = (cxstring)CX_STR("&gt;");
+                entityref = cx_str("&gt;");
             }
         } else {
             if(c == '\"') {
-                entityref = (cxstring)CX_STR("&quot;");
+                entityref = cx_str("&quot;");
             } else if(c == '\'') {
-                entityref = (cxstring)CX_STR("&apos;");
+                entityref = cx_str("&apos;");
             }
         }