diff --git /usr/include/sys/cdefs.h /usr/include/sys/cdefs.h
index 64e4e8b..0f43f4c 100644
--- /usr/include/sys/cdefs.h
+++ /usr/include/sys/cdefs.h
@@ -253,7 +253,9 @@
 
 /* These settings are particular to each product. */
 /* Product: iPhone */
+#if __ENVIRONMENT_ASPEN_VERSION_MIN_REQUIRED__-0 >= 20000
 #define __DARWIN_ONLY_64_BIT_INO_T	1
+#endif
 #define __DARWIN_ONLY_UNIX_CONFORMANCE	1
 #define __DARWIN_ONLY_VERS_1050		1