diff --git a/lib/config-mac.h b/lib/config-mac.h
index 17e012ee7d..b1bfa43e74 100644
--- a/lib/config-mac.h
+++ b/lib/config-mac.h
@@ -40,7 +40,6 @@
 #define HAVE_ERRNO_H            1
 #define HAVE_NETINET_IN_H       1
 #define HAVE_SYS_SOCKET_H       1
-#define HAVE_SYS_SELECT_H       1
 #define HAVE_NETDB_H            1
 #define HAVE_ARPA_INET_H        1
 #define HAVE_UNISTD_H           1