diff --git a/configure.ac b/configure.ac
index cbf27db25..da9aa2d57 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2761,7 +2761,8 @@ if test "x$openssl" = "xyes" ; then
 				;;
 			101*)   ;; # 1.1.x
 			200*)   ;; # LibreSSL
-			300*)   ;; # OpenSSL development branch.
+			300*)   ;; # OpenSSL 3
+			310*)   ;; # OpenSSL development branch.
 		        *)
 				AC_MSG_ERROR([Unknown/unsupported OpenSSL version ("$ssl_library_ver")])
 		                ;;