diff -r 9c24a4eb5ac9 -r 54133f14043f src/linked_list.c
--- a/src/linked_list.c	Mon Sep 09 21:34:39 2024 +0200
+++ b/src/linked_list.c	Mon Sep 09 21:54:22 2024 +0200
@@ -676,7 +676,7 @@
     return 1 != cx_ll_insert_array(list, index, element, 1);
 }
 
-static cx_compare_func cx_ll_insert_sorted_cmp_func;
+static _Thread_local cx_compare_func cx_ll_insert_sorted_cmp_func;
 
 static int cx_ll_insert_sorted_cmp_helper(void const *l, void const *r) {
     cx_linked_list_node const *left = l;