https://jira.mariadb.org/browse/MDEV-24131

diff --git a/unittest/mysys/stacktrace-t.c b/unittest/mysys/stacktrace-t.c
index 8fa0db15b36..67eb099028e 100644
--- a/unittest/mysys/stacktrace-t.c
+++ b/unittest/mysys/stacktrace-t.c
@@ -22,6 +22,14 @@
 
 char b_bss[10];
 
+#ifndef HAVE_STACKTRACE
+int  my_safe_print_str(const char* val, size_t max_len)
+{
+  printf("%*s\n", (int) max_len, val);
+  return 0;
+}
+#endif
+
 void test_my_safe_print_str()
 {
   char b_stack[10];