diff --git a/ngx_http_auth_ldap_module.c b/ngx_http_auth_ldap_module.c
index e7e606d..28a81c9 100644
--- a/ngx_http_auth_ldap_module.c
+++ b/ngx_http_auth_ldap_module.c
@@ -2237,6 +2237,7 @@ ngx_http_auth_ldap_check_group(ngx_http_request_t *r, ngx_http_auth_ldap_ctx_t *
             for_filter);
         ngx_sprintf(filter, "(&(%s)(%s=%s))", cn_gr, ctx->server->group_attribute.data, user_val);
         ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "http_auth_ldap: user \"%s\"", (const char *) user_val);
+        ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "http_auth_ldap: group_atr \"%s\"", (const char *) ctx->server->group_attribute.data);
         ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "http_auth_ldap: group \"%s\"", (const char *) cn_gr);
         ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "http_auth_ldap: Search group filter is \"%s\"", (const char *) filter);
         attrs[0] = LDAP_NO_ATTRS;