diff -r 07b815faa6ac -r f00d03835dd9 src/ucx/compare.c
--- a/src/ucx/compare.c	Tue Dec 30 21:44:49 2025 +0100
+++ b/src/ucx/compare.c	Tue Jan 13 18:09:20 2026 +0100
@@ -29,6 +29,7 @@
 #include "cx/compare.h"
 
 #include <math.h>
+#include <string.h>
 
 int cx_vcmp_int(int a, int b) {
     if (a == b) {
@@ -289,3 +290,12 @@
         return p1 < p2 ? -1 : 1;
     }
 }
+
+int cx_cmp_wrap(
+        const void *ptr1,
+        const void *ptr2,
+        void *w
+) {
+    cx_compare_func_wrapper *wrapper = w;
+    return wrapper->cmp(ptr1, ptr2);
+}