diff --git a/dnscrypt-proxy/xtransport.go b/dnscrypt-proxy/xtransport.go
index 9dca1384..c9267d4e 100644
--- a/dnscrypt-proxy/xtransport.go
+++ b/dnscrypt-proxy/xtransport.go
@@ -224,6 +224,9 @@ func (xTransport *XTransport) Fetch(method string, url *url.URL, accept string,
 	}
 	var err error
 	host := url.Host
+	if xTransport.proxyDialer == nil && strings.HasSuffix(host, ".onion") {
+		return nil, 0, errors.New("Onion service is not reachable without Tor")
+	}
 	resolveByProxy := false
 	if xTransport.proxyDialer != nil || xTransport.httpProxyFunction != nil {
 		resolveByProxy = true