diff --git a/modules/ssl/ssl_engine_config.c b/modules/ssl/ssl_engine_config.c
index e238c486e8..cabe29ed90 100644
--- a/modules/ssl/ssl_engine_config.c
+++ b/modules/ssl/ssl_engine_config.c
@@ -1352,7 +1352,7 @@ static const char *ssl_cmd_protocol_parse(cmd_parms *parms,
             if (*options != SSL_PROTOCOL_NONE) {
                 ap_log_error(APLOG_MARK, APLOG_WARNING, 0, parms->server, APLOGNO(02532)
                              "%s: Protocol '%s' overrides already set parameter(s). "
-                             "Check if a prefix is not missing.",
+                             "Check if a +/- prefix is missing.",
                              parms->cmd->name, w);
             }
             *options = thisopt;