diff --git a/AGHTechDoc.md b/AGHTechDoc.md
index 3e3574e2..527a7eaa 100644
--- a/AGHTechDoc.md
+++ b/AGHTechDoc.md
@@ -344,10 +344,14 @@ Response:
 
 If `can_autoupdate` is true, then the server can automatically upgrade to a new version.
 
-Response with empty body:
+Response when auto-update is disabled by command-line aragument:
 
 	200 OK
 
+	{
+		"disabled":true
+	}
+
 It means that update check is disabled by user.  UI should do nothing.
 
 
diff --git a/home/control_update.go b/home/control_update.go
index d734f4d1..566b8327 100644
--- a/home/control_update.go
+++ b/home/control_update.go
@@ -41,6 +41,10 @@ type getVersionJSONRequest struct {
 // Get the latest available version from the Internet
 func handleGetVersionJSON(w http.ResponseWriter, r *http.Request) {
 	if Context.disableUpdate {
+		resp := make(map[string]interface{})
+		resp["disabled"] = true
+		d, _ := json.Marshal(resp)
+		_, _ = w.Write(d)
 		return
 	}