diff --git a/extras/outbounds/dns_https.go b/extras/outbounds/dns_https.go
index d7f0781..c6817c1 100644
--- a/extras/outbounds/dns_https.go
+++ b/extras/outbounds/dns_https.go
@@ -20,7 +20,7 @@ type dohResolver struct {
 
 func NewDoHResolver(addr string, timeout time.Duration, sni string, insecure bool, next PluggableOutbound) PluggableOutbound {
 	// User may provide just the IP address or full URL
-	if !strings.HasSuffix(addr, "https://") {
+	if !strings.HasPrefix(addr, "https://") {
 		addr = fmt.Sprintf("https://%s/dns-query", addr)
 	}
 	tr := http.DefaultTransport.(*http.Transport).Clone()