--- libmalloc/libmalloc-715.140.5/private/malloc_private.h
+++ libmalloc/libmalloc-646.40.3/private/malloc_private.h
@@ -105,7 +105,7 @@
  */
 #if !TARGET_OS_EXCLAVECORE && !TARGET_OS_EXCLAVEKIT
 SPI_AVAILABLE(macos(14.3), ios(17.4), tvos(17.4), watchos(10.4),
-		driverkit(23.4), visionos(1.1))
+		driverkit(23.4), xros(1.1))
 int malloc_engaged_secure_allocator(void) __result_use_check;
 #endif
 
@@ -142,7 +142,6 @@
 	uintptr_t DisableExpensiveDebuggingOptions : 1;
 	uintptr_t DisableProbabilisticGuardMalloc : 1;
 	uintptr_t DisableMallocStackLogging : 1;
-	uintptr_t ReservedFlag : 1;
 } malloc_thread_options_t;
 
 #if !TARGET_OS_EXCLAVECORE && !TARGET_OS_EXCLAVEKIT
@@ -241,7 +240,7 @@
  * @function malloc_type_zone_malloc_with_options_np
  *
  * @discussion
- * When malloc_zone_malloc_with_options_np was introduced, the TMO inference
+ * When malloc_zone_malloc_with_options_np was introduced, the TMO inferrence
  * argument index was incorrectly set to the 4th argument (options). As such,
  * TMO rewritten callsites will put the type descriptor in the 5th argument,
  * instead of the 4th. To avoid revlocking and potential bincompat issues, we're
@@ -253,7 +252,7 @@
  */
 SPI_DEPRECATED("Do not call through typed entrypoint directly",
 		macos(14.3, 15.0), ios(17.4, 18.0), tvos(17.4, 18.0),
-		watchos(10.4, 11.0), driverkit(23.4, 24.0), visionos(1.1, 2.0))
+		watchos(10.4, 11.0), driverkit(23.4, 24.0), xros(1.1, 2.0))
 void * __sized_by_or_null(size) malloc_type_zone_malloc_with_options_np(
 		malloc_zone_t *zone, size_t align, size_t size,
 		malloc_options_np_t options, malloc_type_id_t desc) __result_use_check
@@ -273,7 +272,7 @@
  * implementation detail for malloc_zone_malloc_with_options_np
  */
 SPI_AVAILABLE(macos(15.0), ios(18.0), tvos(18.0), watchos(11.0),
-		driverkit(24.0), visionos(2.0))
+		driverkit(24.0), xros(2.0))
 void * __sized_by_or_null(size) malloc_type_zone_malloc_with_options_internal(
 		malloc_zone_t *zone, size_t align, size_t size,
 		malloc_type_id_t desc, malloc_options_np_t options) __result_use_check
@@ -313,7 +312,7 @@
  * This SPI does not set errno on all codepaths when the allocation fails.
  */
 SPI_AVAILABLE(macos(14.3), ios(17.4), tvos(17.4), watchos(10.4),
-		driverkit(23.4), visionos(1.1))
+		driverkit(23.4), xros(1.1))
 void * __sized_by_or_null(size) malloc_zone_malloc_with_options_np(
 		malloc_zone_t *zone, size_t align, size_t size,
 		malloc_options_np_t options) __result_use_check
@@ -329,14 +328,9 @@
 #if !TARGET_OS_EXCLAVECORE && !TARGET_OS_EXCLAVEKIT
 // Indicates whether the libmalloc debug dylib is in use in the current process
 SPI_AVAILABLE(macos(14.3), ios(17.4), tvos(17.4), watchos(10.4),
-		driverkit(23.4), visionos(1.1))
+		driverkit(23.4), xros(1.1))
 bool
 malloc_variant_is_debug_4test(void);
-
-// Indicates whether libmalloc internal security policy is enabled in the
-// current process
-bool
-malloc_allows_internal_security_4test(void);
 #endif /* !TARGET_OS_EXCLAVECORE && !TARGET_OS_EXCLAVEKIT */
 
 __END_DECLS