diff --git a/client/components/MessageCondensed.vue b/client/components/MessageCondensed.vue
index ba20283b..c45a7ac0 100644
--- a/client/components/MessageCondensed.vue
+++ b/client/components/MessageCondensed.vue
@@ -19,7 +19,7 @@
 
 <script lang="ts">
 import {computed, defineComponent, PropType, ref} from "vue";
-import constants from "../js/constants";
+import {condensedTypes} from "../../shared/irc";
 import {ClientMessage, ClientNetwork} from "../js/types";
 import Message from "./Message.vue";
 
@@ -51,7 +51,7 @@ export default defineComponent({
 		const condensedText = computed(() => {
 			const obj: Record<string, number> = {};
 
-			constants.condensedTypes.forEach((type) => {
+			condensedTypes.forEach((type) => {
 				obj[type] = 0;
 			});
 
@@ -75,7 +75,7 @@ export default defineComponent({
 			obj.part += obj.quit;
 
 			const strings: string[] = [];
-			constants.condensedTypes.forEach((type) => {
+			condensedTypes.forEach((type) => {
 				if (obj[type]) {
 					switch (type) {
 						case "chghost":
diff --git a/client/components/MessageList.vue b/client/components/MessageList.vue
index b5779c91..7de87d08 100644
--- a/client/components/MessageList.vue
+++ b/client/components/MessageList.vue
@@ -58,7 +58,7 @@
 </template>
 
 <script lang="ts">
-import constants from "../js/constants";
+import {condensedTypes} from "../../shared/irc";
 import eventbus from "../js/eventbus";
 import clipboard from "../js/clipboard";
 import socket from "../js/socket";
@@ -184,7 +184,7 @@ export default defineComponent({
 			// If actions are hidden, just return a message list with them excluded
 			if (store.state.settings.statusMessages === "hidden") {
 				return props.channel.messages.filter(
-					(message) => !constants.condensedTypes.has(message.type)
+					(message) => !condensedTypes.has(message.type)
 				);
 			}
 
@@ -200,11 +200,7 @@ export default defineComponent({
 			for (const message of props.channel.messages) {
 				// If this message is not condensable, or its an action affecting our user,
 				// then just append the message to container and be done with it
-				if (
-					message.self ||
-					message.highlight ||
-					!constants.condensedTypes.has(message.type)
-				) {
+				if (message.self || message.highlight || !condensedTypes.has(message.type)) {
 					lastCondensedContainer = null;
 
 					condensed.push(message);
diff --git a/client/js/constants.ts b/client/js/constants.ts
index a2885edb..725224bd 100644
--- a/client/js/constants.ts
+++ b/client/js/constants.ts
@@ -17,18 +17,6 @@ const colorCodeMap = [
 	["15", "Light Grey"],
 ];
 
-const condensedTypes = new Set([
-	"away",
-	"back",
-	"chghost",
-	"join",
-	"kick",
-	"mode",
-	"nick",
-	"part",
-	"quit",
-]);
-
 const timeFormats = {
 	msgDefault: "HH:mm",
 	msgWithSeconds: "HH:mm:ss",
@@ -39,7 +27,6 @@ const timeFormats = {
 export default {
 	colorCodeMap,
 	commands: [] as string[],
-	condensedTypes,
 	timeFormats,
 	// Same value as media query in CSS that forces sidebars to become overlays
 	mobileViewportPixels: 768,
diff --git a/server/client.ts b/server/client.ts
index bd8dd24b..826bef13 100644
--- a/server/client.ts
+++ b/server/client.ts
@@ -9,7 +9,7 @@ import log from "./log";
 import Chan, {Channel, ChanType} from "./models/chan";
 import Msg, {MessageType, UserInMessage} from "./models/msg";
 import Config from "./config";
-import constants from "../client/js/constants";
+import {condensedTypes} from "../shared/irc";
 
 import inputs from "./plugins/inputs";
 import PublicClient from "./plugins/packages/publicClient";
@@ -569,7 +569,7 @@ class Client {
 					startIndex--;
 
 					// Do not count condensed messages towards the 100 messages
-					if (constants.condensedTypes.has(chan.messages[i].type)) {
+					if (condensedTypes.has(chan.messages[i].type)) {
 						continue;
 					}
 
diff --git a/server/tsconfig.json b/server/tsconfig.json
index ef6e0817..06045646 100644
--- a/server/tsconfig.json
+++ b/server/tsconfig.json
@@ -5,7 +5,6 @@
     "../shared/"
   ] /* Specifies a list of glob patterns that match files to be included in compilation. If no 'files' or 'include' property is present in a tsconfig.json, the compiler defaults to including all files in the containing directory and subdirectories except those specified by 'exclude'. Requires TypeScript version 2.0 or later. */,
   "files": [
-    "../client/js/constants.ts",
     "../babel.config.cjs",
     "../defaults/config.js",
     "../package.json",
diff --git a/shared/irc.ts b/shared/irc.ts
index 4a18613e..8c954581 100644
--- a/shared/irc.ts
+++ b/shared/irc.ts
@@ -4,3 +4,15 @@ const matchFormatting =
 export function cleanIrcMessage(message: string) {
 	return message.replace(matchFormatting, "").trim();
 }
+
+export const condensedTypes = new Set([
+	"away",
+	"back",
+	"chghost",
+	"join",
+	"kick",
+	"mode",
+	"nick",
+	"part",
+	"quit",
+]);
diff --git a/test/client/js/constantsTest.ts b/test/client/js/constantsTest.ts
index 04daa314..26ae668b 100644
--- a/test/client/js/constantsTest.ts
+++ b/test/client/js/constantsTest.ts
@@ -18,19 +18,6 @@ describe("client-side constants", function () {
 		});
 	});
 
-	describe(".condensedTypes", function () {
-		it("should be a non-empty array", function () {
-			expect(constants.condensedTypes).to.be.an.instanceof(Set).that.is.not.empty;
-		});
-
-		it("should only contain ASCII strings", function () {
-			// @ts-expect-error ts-migrate(7006) FIXME: Parameter 'type' implicitly has an 'any' type.
-			constants.condensedTypes.forEach((type) => {
-				expect(type).to.be.a("string").that.does.match(/^\w+$/);
-			});
-		});
-	});
-
 	describe(".timeFormats", function () {
 		it("should be objects of strings", function () {
 			expect(constants.timeFormats.msgDefault).to.be.an("string").that.is.not.empty;
diff --git a/test/shared/irc.ts b/test/shared/irc.ts
new file mode 100644
index 00000000..fb0d7168
--- /dev/null
+++ b/test/shared/irc.ts
@@ -0,0 +1,14 @@
+import {expect} from "chai";
+import {condensedTypes} from "../../shared/irc";
+
+describe(".condensedTypes", function () {
+	it("should be a non-empty array", function () {
+		expect(condensedTypes).to.be.an.instanceof(Set).that.is.not.empty;
+	});
+
+	it("should only contain ASCII strings", function () {
+		condensedTypes.forEach((type) => {
+			expect(type).to.be.a("string").that.does.match(/^\w+$/);
+		});
+	});
+});