Index: configure.ac
==================================================================
--- configure.ac
+++ configure.ac
@@ -1728,13 +1728,10 @@
 		AC_CHECK_HEADERS(Security/SecureTransport.h, [
 			old_LIBS="$LIBS"
 			LIBS="-framework Security -framework Foundation $LIBS"
 
 			AC_CHECK_FUNC(SSLHandshake, [
-				AC_DEFINE(HAVE_SECURE_TRANSPORT, 1,
-					[Whether we have Secure Transport])
-
 				tls_support="Secure Transport"
 				TLS_LIBS="-framework Foundation $TLS_LIBS"
 				TLS_LIBS="-framework Security $TLS_LIBS"
 
 				AC_SUBST(OF_SECURE_TRANSPORT_TLS_STREAM_M,
@@ -1748,12 +1745,10 @@
 	])
 
 	AS_IF([test x"$with_tls" = x"gnutls" \
 	    -o \( x"$with_tls" = x"yes" -a x"$tls_support" = x"no" \)], [
 		PKG_CHECK_MODULES(gnutls, [gnutls >= 3.5.0], [
-			AC_DEFINE(HAVE_GNUTLS, 1, [Whether we have GnuTLS])
-
 			tls_support="GnuTLS"
 			TLS_CPPFLAGS="$gnutls_CFLAGS $TLS_CPPFLAGS"
 			TLS_LIBS="$gnutls_LIBS $TLS_LIBS"
 
 			AC_SUBST(OF_GNUTLS_TLS_STREAM_M, "OFGnuTLSTLSStream.m")
@@ -1777,13 +1772,10 @@
 			;;
 		esac
 
 		AC_CHECK_LIB($ssl, SSL_set1_host, [
 			AC_CHECK_HEADER(openssl/ssl.h, [
-				AC_DEFINE(HAVE_OPENSSL, 1,
-					[Whether we have OpenSSL])
-
 				tls_support="OpenSSL"
 				TLS_LIBS="-l$ssl -l$crypto $TLS_LIBS"
 
 				AC_SUBST(OF_OPENSSL_TLS_STREAM_M,
 					"OFOpenSSLTLSStream.m")