--- libmalloc/libmalloc-374.60.3/tests/magazine_rack.c
+++ libmalloc/libmalloc-409.60.6/tests/magazine_rack.c
@@ -8,6 +8,9 @@
 
 #include <darwintest.h>
 #include "magazine_testing.h"
+
+// Stubs
+malloc_zero_policy_t malloc_zero_policy = MALLOC_ZERO_POLICY_DEFAULT;
 
 T_GLOBAL_META(T_META_RUN_CONCURRENTLY(true));