diff --git a/extensions/telegram/src/normalize.ts b/extensions/telegram/src/normalize.ts
index 65d6cafcb50..012e8e05ae5 100644
--- a/extensions/telegram/src/normalize.ts
+++ b/extensions/telegram/src/normalize.ts
@@ -1,8 +1,11 @@
-import { normalizeLowercaseStringOrEmpty } from "openclaw/plugin-sdk/text-runtime";
 import { normalizeTelegramLookupTarget, parseTelegramTarget } from "./targets.js";
 
 const TELEGRAM_PREFIX_RE = /^(telegram|tg):/i;
 
+function normalizeLowercaseStringOrEmpty(value: unknown): string {
+  return typeof value === "string" ? value.trim().toLowerCase() : "";
+}
+
 function normalizeTelegramTargetBody(raw: string): string | undefined {
   const trimmed = raw.trim();
   if (!trimmed) {