diff --git a/src/api/routes/channels/#channel_id/messages/index.ts b/src/api/routes/channels/#channel_id/messages/index.ts
index 99523dab8..d399e53af 100644
--- a/src/api/routes/channels/#channel_id/messages/index.ts
+++ b/src/api/routes/channels/#channel_id/messages/index.ts
@@ -41,6 +41,7 @@ import {
 	Snowflake,
 	uploadFile,
 	User,
+	stringGlobToRegexp,
 } from "@spacebar/util";
 import { Request, Response, Router } from "express";
 import { HTTPError } from "lambert-server";
@@ -453,8 +454,8 @@ router.post(
 
 						if (rule.trigger_type == AutomodTriggerTypes.CUSTOM_WORDS) {
 							const triggerMeta = rule.trigger_metadata as AutomodCustomWordsRule;
-							const regexes = triggerMeta.regex_patterns.map((x) => new RegExp(x, "i")).concat(triggerMeta.keyword_filter.map((k) => k.globToRegexp("i")));
-							const allowedRegexes = triggerMeta.allow_list.map((k) => k.globToRegexp("i"));
+							const regexes = triggerMeta.regex_patterns.map((x) => new RegExp(x, "i")).concat(triggerMeta.keyword_filter.map((k) => stringGlobToRegexp(k, "i")));
+							const allowedRegexes = triggerMeta.allow_list.map((k) => stringGlobToRegexp(k, "i"));
 
 							const matches = regexes
 								.map((r) => message.content!.match(r))
diff --git a/src/util/util/String.ts b/src/util/util/String.ts
index 2d2e132a7..f79e73f20 100644
--- a/src/util/util/String.ts
+++ b/src/util/util/String.ts
@@ -37,4 +37,10 @@ export function centerString(str: string, len: number): string {
 	const pad = len - str.length;
 	const padLeft = Math.floor(pad / 2) + str.length;
 	return str.padStart(padLeft).padEnd(len);
-}
\ No newline at end of file
+}
+
+export function stringGlobToRegexp(str: string, flags?: string): RegExp {
+	// Convert simple wildcard patterns to regex
+	const escaped = str.replace(".", "\\.").replace("?", ".").replace("*", ".*");
+	return new RegExp(escaped, flags);
+}
diff --git a/src/util/util/extensions/String.test.ts b/src/util/util/extensions/String.test.ts
deleted file mode 100644
index d5cc9292e..000000000
--- a/src/util/util/extensions/String.test.ts
+++ /dev/null
@@ -1,15 +0,0 @@
-import moduleAlias from "module-alias";
-moduleAlias();
-import './String';
-import {  describe, it } from 'node:test';
-import assert from 'node:assert/strict';
-
-describe("String extensions", () => {
-
-	it("globToRegexp", () => {
-		const pattern = "file-*.txt";
-		const regex = pattern.globToRegexp();
-		assert.ok(regex.test("file-123.txt"));
-	});
-
-});
\ No newline at end of file
diff --git a/src/util/util/extensions/String.ts b/src/util/util/extensions/String.ts
deleted file mode 100644
index ce9b1a513..000000000
--- a/src/util/util/extensions/String.ts
+++ /dev/null
@@ -1,37 +0,0 @@
-/*
-	Spacebar: A FOSS re-implementation and extension of the Discord.com backend.
-	Copyright (C) 2025 Spacebar and Spacebar Contributors
-	
-	This program is free software: you can redistribute it and/or modify
-	it under the terms of the GNU Affero General Public License as published
-	by the Free Software Foundation, either version 3 of the License, or
-	(at your option) any later version.
-	
-	This program is distributed in the hope that it will be useful,
-	but WITHOUT ANY WARRANTY; without even the implied warranty of
-	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-	GNU Affero General Public License for more details.
-	
-	You should have received a copy of the GNU Affero General Public License
-	along with this program.  If not, see <https://www.gnu.org/licenses/>.
-*/
-
-declare global {
-	interface String {
-		globToRegexp(flags?: string): RegExp;
-	}
-}
-
-export function stringGlobToRegexp(str: string, flags?: string): RegExp {
-	// Convert simple wildcard patterns to regex
-        const escaped = str.replace(".", "\\.")
-		.replace("?", ".")
-		.replace("*", ".*")
-	return new RegExp(escaped, flags);
-}
-
-// Register extensions
-if (!String.prototype.globToRegexp)
-	String.prototype.globToRegexp = function (str: string, flags?: string) {
-		return stringGlobToRegexp.call(null, str, flags);
-	};
\ No newline at end of file
diff --git a/src/util/util/extensions/index.ts b/src/util/util/extensions/index.ts
index b7dcf4d53..e1946bb38 100644
--- a/src/util/util/extensions/index.ts
+++ b/src/util/util/extensions/index.ts
@@ -1,2 +1 @@
 export * from "./Array";
-export * from "./String";