diff --git a/sys/kern/subr_csan.c b/sys/kern/subr_csan.c
--- a/sys/kern/subr_csan.c
+++ b/sys/kern/subr_csan.c
@@ -301,6 +301,10 @@
 	return __builtin_memmove(dst, src, len);
 }
 
+__strong_reference(kcsan_memcpy, __tsan_memcpy);
+__strong_reference(kcsan_memset, __tsan_memset);
+__strong_reference(kcsan_memmove, __tsan_memmove);
+
 char *
 kcsan_strcpy(char *dst, const char *src)
 {