diff --git a/src/components/Icons.tsx b/src/components/Icons.tsx
index 93b1323e..8ebe51a1 100644
--- a/src/components/Icons.tsx
+++ b/src/components/Icons.tsx
@@ -255,3 +255,21 @@ export function DeleteIcon(props: IconProps) {
         </Icon>
     );
 }
+
+/**
+ * A plugin icon, created by CorellanStoma. https://github.com/CreArts-Community/Settings-Icons
+ */
+export function PluginIcon(props: IconProps) {
+    return (
+        <Icon
+            {...props}
+            className={classes(props.className, "vc-plugin-icon")}
+            viewBox="0 0 24 24"
+        >
+            <path
+                fill="currentColor"
+                d="M20.5 11H19V7c0-1.1-.9-2-2-2h-4V3.5C13 2.12 11.88 1 10.5 1S8 2.12 8 3.5V5H4c-1.1 0-1.99.9-1.99 2v3.8H3.5c1.49 0 2.7 1.21 2.7 2.7s-1.21 2.7-2.7 2.7H2V20c0 1.1.9 2 2 2h3.8v-1.5c0-1.49 1.21-2.7 2.7-2.7s2.7 1.21 2.7 2.7V22H17c1.1 0 2-.9 2-2v-4h1.5c1.38 0 2.5-1.12 2.5-2.5S21.88 11 20.5 11z"
+            />
+        </Icon>
+    );
+}
diff --git a/src/components/ThemeSettings/ThemesTab.tsx b/src/components/ThemeSettings/ThemesTab.tsx
index 297fbfe3..e9543c20 100644
--- a/src/components/ThemeSettings/ThemesTab.tsx
+++ b/src/components/ThemeSettings/ThemesTab.tsx
@@ -21,7 +21,7 @@ import "./themesStyles.css";
 import { Settings, useSettings } from "@api/Settings";
 import { classNameFactory } from "@api/Styles";
 import { Flex } from "@components/Flex";
-import { CogWheel, DeleteIcon } from "@components/Icons";
+import { CogWheel, DeleteIcon, PluginIcon } from "@components/Icons";
 import { Link } from "@components/Link";
 import { AddonCard } from "@components/VencordSettings/AddonCard";
 import { SettingsTab, wrapTab } from "@components/VencordSettings/shared";
@@ -34,10 +34,11 @@ import type { ThemeHeader } from "@utils/themes";
 import { getThemeInfo, stripBOM, type UserThemeHeader } from "@utils/themes/bd";
 import { usercssParse } from "@utils/themes/usercss";
 import { findByCodeLazy, findByPropsLazy, findLazy } from "@webpack";
-import { Button, Card, FluxDispatcher, Forms, React, showToast, TabBar, TextArea, useEffect, useRef, useState } from "@webpack/common";
-import type { ComponentType, Ref, SyntheticEvent } from "react";
+import { Button, Card, FluxDispatcher, Forms, React, showToast, TabBar, TextArea, Tooltip, useEffect, useMemo, useRef, useState } from "@webpack/common";
+import { type ComponentType, type Ref, type SyntheticEvent } from "react";
 import type { UserstyleHeader } from "usercss-meta";
 
+import { isPluginEnabled } from "../../plugins";
 import { UserCSSSettingsModal } from "./UserCSSModal";
 
 type FileInput = ComponentType<{
@@ -118,6 +119,9 @@ interface UserCSSCardProps {
 }
 
 function UserCSSThemeCard({ theme, enabled, onChange, onDelete }: UserCSSCardProps) {
+    const missingPlugins = useMemo(() =>
+        theme.requiredPlugins?.filter(p => !isPluginEnabled(p)), [theme]);
+
     return (
         <AddonCard
             name={theme.name ?? "Unknown"}
@@ -127,6 +131,19 @@ function UserCSSThemeCard({ theme, enabled, onChange, onDelete }: UserCSSCardPro
             setEnabled={onChange}
             infoButton={
                 <>
+                    {missingPlugins && missingPlugins.length > 0 && (
+                        <Tooltip text={"The following plugins are required, but aren't enabled: " + missingPlugins.join(", ")}>
+                            {({ onMouseLeave, onMouseEnter }) => (
+                                <div
+                                    style={{ color: "var(--status-warning" }}
+                                    onMouseEnter={onMouseEnter}
+                                    onMouseLeave={onMouseLeave}
+                                >
+                                    <PluginIcon />
+                                </div>
+                            )}
+                        </Tooltip>
+                    )}
                     {theme.vars && (
                         <div style={{ cursor: "pointer" }} onClick={
                             () => openModal(modalProps =>
diff --git a/src/utils/themes/usercss/index.ts b/src/utils/themes/usercss/index.ts
index a7d49a60..e4dbe234 100644
--- a/src/utils/themes/usercss/index.ts
+++ b/src/utils/themes/usercss/index.ts
@@ -10,16 +10,22 @@ import { parse as originalParse, UserstyleHeader } from "usercss-meta";
 const UserCSSLogger = new Logger("UserCSS", "#d2acf5");
 
 export async function usercssParse(text: string, fileName: string): Promise<UserstyleHeader> {
-    var { metadata, errors } = originalParse(text.replace(/\r/g, ""), { allowErrors: true });
+    const { metadata, errors } = originalParse(text.replace(/\r/g, ""), {
+        allowErrors: true,
+        unknownKey: "assign"
+    });
 
     if (errors.length) {
         UserCSSLogger.warn("Parsed", fileName, "with errors:", errors);
     }
 
+    const requiredPlugins = metadata["vc-requiredPlugins"]?.split(",").map(p => p.trim());
+
     return {
         ...metadata,
         fileName,
-        id: await getUserCssId(metadata)
+        id: await getUserCssId(metadata),
+        requiredPlugins
     };
 }
 
diff --git a/src/utils/themes/usercss/usercss-meta.d.ts b/src/utils/themes/usercss/usercss-meta.d.ts
index 1a39bf6d..f4d29e63 100644
--- a/src/utils/themes/usercss/usercss-meta.d.ts
+++ b/src/utils/themes/usercss/usercss-meta.d.ts
@@ -55,6 +55,14 @@ declare module "usercss-meta" {
          */
         fileName: string;
 
+        /**
+         * The required plugins for this style.
+         *
+         * @vencord Specific to Vencord, not part of the original module.
+         * @see {@link vc-requiredPlugins}
+         */
+        requiredPlugins?: string[];
+
         /**
          * The name of your style.
          *
@@ -107,7 +115,20 @@ declare module "usercss-meta" {
          * A list of variables the style defines.
          */
         vars: Record<string, UserCSSVariable>;
+
+        /**
+         * Required plugins for this style to work. Comma-separated list of plugin names.
+         *
+         * @vencord This is a Vencord-specific extension, however we wish for this to become a standard for client mods
+         *          to implement, hence the more generic namespaced name.
+         */
+        "vc-requiredPlugins"?: string;
     }
 
-    export function parse(text: string, options: { allowErrors: boolean; }): { metadata: UserstyleHeader; errors: { code: string; args: any; }[]; };
+    type UserCSSParseOptions = {
+        allowErrors: boolean;
+        unknownKey: "assign";
+    };
+
+    export function parse(text: string, options: UserCSSParseOptions): { metadata: UserstyleHeader; errors: { code: string; args: any; }[]; };
 }