diff --git a/contrib/mandoc/config.h b/contrib/mandoc/config.h
index 213513f1c87e..91957717b3fc 100644
--- a/contrib/mandoc/config.h
+++ b/contrib/mandoc/config.h
@@ -1,57 +1,57 @@
 #ifdef __cplusplus
 #error "Do not use C++.  See the INSTALL file."
 #endif
 
 #include <sys/types.h>
 
 #define MAN_CONF_FILE "/etc/man.conf"
 #define MANPATH_BASE "/usr/share/man"
 #define MANPATH_DEFAULT "/usr/share/man:/usr/local/man"
 #define OSENUM MANDOC_OS_OTHER
 #define UTF8_LOCALE "en_US.UTF-8"
 #define HAVE_DIRENT_NAMLEN 1
 #define HAVE_ENDIAN 0
 #define HAVE_ERR 1
 #define HAVE_FTS 1
-#ifdef __GLIBC__
+#if defined(__GLIBC__) || defined(__APPLE__)
 #define HAVE_FTS_COMPARE_CONST 0
 #else
 #define HAVE_FTS_COMPARE_CONST 1
 #endif
 #define HAVE_GETLINE 1
 #define HAVE_GETSUBOPT 1
 #define HAVE_ISBLANK 1
 #define HAVE_LESS_T 1
 #define HAVE_MKDTEMP 1
 #define HAVE_MKSTEMPS 1
 #define HAVE_NTOHL 1
 #define HAVE_PLEDGE 0
 #define HAVE_PROGNAME 1
 #define HAVE_REALLOCARRAY 1
 #define HAVE_RECALLOCARRAY 0
 #define HAVE_REWB_BSD 1
 #define HAVE_REWB_SYSV 1
 #define HAVE_SANDBOX_INIT 0
 #define HAVE_STRCASESTR 1
 #define HAVE_STRINGLIST 1
 #define HAVE_STRLCAT 1
 #define HAVE_STRLCPY 1
 #define HAVE_STRNDUP 1
 #define HAVE_STRPTIME 1
 #define HAVE_STRSEP 1
 #define HAVE_STRTONUM 1
 #define HAVE_SYS_ENDIAN 1
 #define HAVE_VASPRINTF 1
 #define HAVE_WCHAR 1
 #define HAVE_OHASH 1
 #define NEED_XPG4_2 0
 
 #define BINM_APROPOS "apropos"
 #define BINM_CATMAN "catman"
 #define BINM_MAKEWHATIS "makewhatis"
 #define BINM_MAN "man"
 #define BINM_SOELIM "soelim"
 #define BINM_WHATIS "whatis"
 #define BINM_PAGER "less"
 
 extern	void	 *recallocarray(void *, size_t, size_t, size_t);