diff --git a/packages/client/src/config.ts b/packages/client/src/config.ts
index 4f161b8df3..18362c8810 100644
--- a/packages/client/src/config.ts
+++ b/packages/client/src/config.ts
@@ -1,6 +1,6 @@
 import { $i } from "@/account";
 // #v-ifdef VITE_CAPACITOR
-const address = $i ? new URL($i.instanceUrl) : new URL("http://localhost");
+const address = $i ? new URL($i.instanceUrl) : null;
 // #v-else
 const address = new URL(location.href);
 // #v-endif
@@ -15,11 +15,9 @@ export const url = $i?.instanceUrl;
 // #v-else
 export const url = address.origin;
 // #v-endif
-export const apiUrl = `${url ? url : "http://localhost"}/api`;
+export const apiUrl = url + "/api";
 export const wsUrl = `${
-	url
-		? url.replace("http://", "ws://").replace("https://", "wss://")
-		: "ws://localhost"
+	url.replace("http://", "ws://").replace("https://", "wss://")
 }/streaming`;
 export const lang = localStorage.getItem("lang");
 export const langs = _LANGS_;
diff --git a/packages/client/src/os.ts b/packages/client/src/os.ts
index 2805385f8d..895fe41a41 100644
--- a/packages/client/src/os.ts
+++ b/packages/client/src/os.ts
@@ -16,7 +16,7 @@ export const pendingApiRequestsCount = ref(0);
 
 const apiClient = new Misskey.api.APIClient({
 	// #v-ifdef VITE_CAPACITOR
-	origin: $i?.instanceUrl || url || window.location.origin,
+	origin: $i?.instanceUrl || window.location.origin,
 	// #v-else
 	origin: url,
 	// #v-endif