--- libmalloc/libmalloc-409.81.2/src/magazine_inline.h
+++ libmalloc/libmalloc-409.40.6/src/magazine_inline.h
@@ -754,6 +754,9 @@
 #pragma mark zero on free
 
 MALLOC_NOEXPORT
+extern bool malloc_zero_on_free;
+
+MALLOC_NOEXPORT
 extern unsigned malloc_zero_on_free_sample_period;
 
 static MALLOC_INLINE bool