diff --git a/docs/src/build.md b/docs/src/build.md
index 6cb04e8..1fa9cde 100644
--- a/docs/src/build.md
+++ b/docs/src/build.md
@@ -238,25 +238,16 @@ Relies on the `zotero-types` package to provide type declarations for `Zotero.Pr
 You can also use the following helper to get or set preferences while omitting the prefix, simplifying your code.
 
 ```ts
-const PREFS_PREFIX = "extensions.myPlugin";
-
-/**
- * Get preference value.
- * Wrapper of `Zotero.Prefs.get`.
- * @param key
- */
-export function getPref<K extends keyof _PluginPrefsMap>(key: K) {
-  return Zotero.Prefs.get(`${PREFS_PREFIX}.${key}` as PluginPrefKey<K>, true);
+const PREF_PREFIX = "extensions.myPlugin";
+
+type PluginPrefsMap = _ZoteroTypes.Prefs["PluginPrefsMap"];
+
+export function getPref<K extends keyof PluginPrefsMap>(key: K) {
+  return Zotero.Prefs.get(`${PREF_PREFIX}.${key}`, true) as PluginPrefsMap[K];
 }
 
-/**
- * Set preference value.
- * Wrapper of `Zotero.Prefs.set`.
- * @param key
- * @param value
- */
-export function setPref<K extends keyof _PluginPrefsMap>(key: K, value: PluginPrefsMap[PluginPrefKey<K>]) {
-  return Zotero.Prefs.set(`${PREFS_PREFIX}.${key}` as PluginPrefKey<K>, value, true);
+export function setPref<K extends keyof PluginPrefsMap>(key: K, value: PluginPrefsMap[K]) {
+  return Zotero.Prefs.set(`${PREF_PREFIX}.${key}`, value, true);
 }
 ```
 
diff --git a/packages/scaffold/src/core/builder.ts b/packages/scaffold/src/core/builder.ts
index 2ab1cf6..36c925c 100644
--- a/packages/scaffold/src/core/builder.ts
+++ b/packages/scaffold/src/core/builder.ts
@@ -259,7 +259,7 @@ export default class Build extends Base {
 
     // Generate prefs.d.ts
     if (dts) {
-      const dtsContent = renderPluginPrefsDts(prefsWithoutPrefix, prefix);
+      const dtsContent = renderPluginPrefsDts(prefsWithoutPrefix);
       await outputFile(dts, dtsContent, "utf-8");
     }
 
diff --git a/packages/scaffold/src/utils/prefs-manager.test.ts b/packages/scaffold/src/utils/prefs-manager.test.ts
index 76ff5aa..bc2f393 100644
--- a/packages/scaffold/src/utils/prefs-manager.test.ts
+++ b/packages/scaffold/src/utils/prefs-manager.test.ts
@@ -203,7 +203,6 @@ describe("renderPluginPrefsDts", () => {
       "test.string": "hello",
       "test.number": 42,
     };
-    const prefix = "prefix";
 
     const result = `// Generated by zotero-plugin-scaffold
 /* prettier-ignore */
@@ -211,19 +210,15 @@ describe("renderPluginPrefsDts", () => {
 // @ts-nocheck
 
 // prettier-ignore
-type _PluginPrefsMap = {
-  "test.string": string;
-  "test.number": number;
-};
-
-// prettier-ignore
-type PluginPrefKey<K extends keyof _PluginPrefsMap> = \`prefix.\${K}\`;
-
-// prettier-ignore
-type PluginPrefsMap = {
-  [K in keyof _PluginPrefsMap as PluginPrefKey<K>]: _PluginPrefsMap[K]
-};
+declare namespace _ZoteroTypes {
+  interface Prefs {
+    PluginPrefsMap: {
+      "test.string": string;
+      "test.number": number;
+    };
+  }
+}
 `;
-    expect(renderPluginPrefsDts(prefs, prefix)).toBe(result);
+    expect(renderPluginPrefsDts(prefs)).toBe(result);
   });
 });
diff --git a/packages/scaffold/src/utils/prefs-manager.ts b/packages/scaffold/src/utils/prefs-manager.ts
index 252903e..fb31f3a 100644
--- a/packages/scaffold/src/utils/prefs-manager.ts
+++ b/packages/scaffold/src/utils/prefs-manager.ts
@@ -107,35 +107,37 @@ export class PrefsManager {
   }
 }
 
-export function renderPluginPrefsDts(prefs: Prefs, prefix: string) {
-  const dtsContent = `// Generated by zotero-plugin-scaffold
+export function renderPluginPrefsDts(prefs: Prefs) {
+  return `// Generated by zotero-plugin-scaffold
 /* prettier-ignore */
 /* eslint-disable */
 // @ts-nocheck
 
 // prettier-ignore
-type _PluginPrefsMap = {
-  ${Object.entries(prefs).map(([key, value]) => {
-    return `"${key}": ${typeof value};`;
-  }).join("\n  ")}
-};
-
-// prettier-ignore
-type PluginPrefKey<K extends keyof _PluginPrefsMap> = \`${prefix}.\${K}\`;
-
-// prettier-ignore
-type PluginPrefsMap = {
-  [K in keyof _PluginPrefsMap as PluginPrefKey<K>]: _PluginPrefsMap[K]
-};
+declare namespace _ZoteroTypes {
+  interface Prefs {
+    PluginPrefsMap: {
+      ${Object.entries(prefs).map(([key, value]) => {
+        return `"${key}": ${typeof value};`;
+      }).join("\n      ")}
+    };
+  }
+}
 `;
-  return dtsContent;
 }
 
-const _backup = `
+/** Backup */
+// // prettier-ignore
+// type PluginPrefKey<K extends keyof _PluginPrefsMap> = \`${prefix}.\${K}\`;
+//
+// // prettier-ignore
+// type PluginPrefsMap = {
+//   [K in keyof _PluginPrefsMap as PluginPrefKey<K>]: _PluginPrefsMap[K]
+// };
+//
 // declare namespace _ZoteroTypes {
 //   interface Prefs {
 //     get: <K extends keyof PluginPrefsMap>(key: K, global?: boolean) => PluginPrefsMap[K];
 //     set: <K extends keyof PluginPrefsMap>(key: K, value: PluginPrefsMap[K], global?: boolean) => any;
 //   }
 // }
-`;