--- Libc/Libc-1725.40.4/os/api.h
+++ Libc/Libc-1506.40.4/os/api.h
@@ -51,8 +51,6 @@
 
 #include <os/availability.h>
 #include <stdint.h>
-
-OS_ASSUME_PTR_ABI_SINGLE_BEGIN;
 
 /*!
  * @const DARWIN_API_VERSION
@@ -120,6 +118,4 @@
  */
 typedef uint32_t os_struct_version_t;
 
-OS_ASSUME_PTR_ABI_SINGLE_END;
-
 #endif // __DARWIN_API_H