--- libmalloc/libmalloc-657.60.21/private/make_tapi_happy.h
+++ libmalloc/libmalloc-715.100.22/private/make_tapi_happy.h
@@ -32,6 +32,7 @@
 typedef uint8_t xzm_segment_group_id_t;
 typedef uint8_t xzm_xzone_bucket_t;
 extern malloc_zone_t **malloc_zones;
+union xzm_bucketing_keys_u;
 
 #if defined(__LP64__)
 extern const struct malloc_introspection_t xzm_malloc_zone_introspect;