diff --git a/ui/src/ui/app-gateway.node.test.ts b/ui/src/ui/app-gateway.node.test.ts
index c386e14d093..6915a30f999 100644
--- a/ui/src/ui/app-gateway.node.test.ts
+++ b/ui/src/ui/app-gateway.node.test.ts
@@ -243,6 +243,26 @@ describe("resolveControlUiClientVersion", () => {
     ).toBe("2026.3.3");
   });
 
+  it("returns serverVersion for same-origin relative targets", () => {
+    expect(
+      resolveControlUiClientVersion({
+        gatewayUrl: "/ws",
+        serverVersion: "2026.3.3",
+        pageUrl: "https://control.example.com/openclaw/",
+      }),
+    ).toBe("2026.3.3");
+  });
+
+  it("returns serverVersion for same-origin http targets", () => {
+    expect(
+      resolveControlUiClientVersion({
+        gatewayUrl: "https://control.example.com/ws",
+        serverVersion: "2026.3.3",
+        pageUrl: "https://control.example.com/openclaw/",
+      }),
+    ).toBe("2026.3.3");
+  });
+
   it("omits serverVersion for cross-origin targets", () => {
     expect(
       resolveControlUiClientVersion({
diff --git a/ui/src/ui/app-gateway.ts b/ui/src/ui/app-gateway.ts
index 805fcb31570..15b885be26a 100644
--- a/ui/src/ui/app-gateway.ts
+++ b/ui/src/ui/app-gateway.ts
@@ -102,8 +102,8 @@ export function resolveControlUiClientVersion(params: {
   try {
     const page = new URL(pageUrl);
     const gateway = new URL(params.gatewayUrl, page);
-    const expectedWsProtocol = page.protocol === "https:" ? "wss:" : "ws:";
-    if (gateway.protocol !== expectedWsProtocol || gateway.host !== page.host) {
+    const allowedProtocols = new Set(["ws:", "wss:", "http:", "https:"]);
+    if (!allowedProtocols.has(gateway.protocol) || gateway.host !== page.host) {
       return undefined;
     }
     return serverVersion;