https://bugs.gentoo.org/695574
--- a/m4/mydns.m4
+++ b/m4/mydns.m4
@@ -37,7 +37,7 @@
 ##
 AC_DEFUN([AC_WITH_OPENSSL_LIB],
 	[
-		ac_ssl_lib_dirs="/lib /usr/lib /usr/local/lib /usr/ssl/lib /usr/local/ssl/lib"
+		ac_ssl_lib_dirs="/lib /usr/lib /usr/lib64 /usr/local/lib /usr/ssl/lib /usr/local/ssl/lib"
 		AC_ARG_WITH(openssl-lib,
 			AC_HELP_STRING([--with-openssl-lib=DIR], [look for the OpenSSL libraries in DIR]),
 			ac_ssl_lib_dirs="$withval $ac_ssl_lib_dirs")