--- Libc/Libc-583/include/fts.h
+++ Libc/Libc-825.26/include/fts.h
@@ -165,6 +165,7 @@
 } FTSENT;
 
 #include <sys/cdefs.h>
+#include <Availability.h>
 
 __BEGIN_DECLS
 //Begin-Libc
@@ -201,7 +202,7 @@
 #ifndef LIBC_ALIAS_FTS_OPEN_B
 //End-Libc
 FTS	*fts_open_b(char * const *, int,
-	    int (^)(const FTSENT **, const FTSENT **)) __DARWIN_INODE64(fts_open_b);
+	    int (^)(const FTSENT **, const FTSENT **)) __DARWIN_INODE64(fts_open_b) __OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_3_2);
 //Begin-Libc
 #else /* LIBC_ALIAS_FTS_OPEN */
 FTS	*fts_open_b(char * const *, int,