--- Libc/Libc-583/include/libkern/Makefile.inc
+++ /dev/null
@@ -1,7 +0,0 @@
-LIBKERN_INSTHDRS += OSAtomic.h OSCacheControl.h
-
-.ifdef FEATURE_MEM_THERM_NOTIFICATION_APIS
-LIBKERN_INSTHDRS += OSMemoryNotification.h OSThermalNotification.h
-.endif
-
-LIBKERN_INSTHDRS := ${LIBKERN_INSTHDRS:S/^/${.CURDIR}\/include\/libkern\//}