--- mod_diagnostics.c 2009-01-07 16:01:59.000000000 +0100 +++ mod_diagnostics.c.oden 2009-01-07 16:03:25.000000000 +0100 @@ -41,7 +41,7 @@ static void diagnostic_log(ap_filter_t* } static int diagnostic_ofilter (ap_filter_t* f, apr_bucket_brigade* bb) { apr_bucket* b ; - ap_log_perror(APLOG_MARK, APLOG_NOTICE, 0, f->c->pool, f->frec->name) ; + ap_log_perror(APLOG_MARK, APLOG_NOTICE, 0, f->c->pool, "%s", f->frec->name) ; for ( b = APR_BRIGADE_FIRST(bb) ; b != APR_BRIGADE_SENTINEL(bb) ;