Allow building against OpenSSL dev (3.x) version.

1 files changed, 2 insertions, 1 deletions

diff --git a/configure.ac b/configure.ac
index 25ac38f7e..30be6c182 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2622,8 +2622,9 @@ if test "x$openssl" = "xyes" ; then
                                 ;;
                         101*)   ;; # 1.1.x
                         200*)   ;; # LibreSSL
+                        300*)   ;; # OpenSSL development branch.
                         *)
-                                AC_MSG_ERROR([OpenSSL > 1.1.x is not yet supported (have "$ssl_library_ver")])
+                                AC_MSG_ERROR([Unknown/unsupported OpenSSL version ("$ssl_library_ver")])
                                 ;;
                         esac
                         AC_MSG_RESULT([$ssl_library_ver])