diff --git a/packages/typescript/src/options/interfaces.ts b/packages/typescript/src/options/interfaces.ts
index 5e3cd6041..17733d6fe 100644
--- a/packages/typescript/src/options/interfaces.ts
+++ b/packages/typescript/src/options/interfaces.ts
@@ -1,21 +1,12 @@
-/** Properties of `CompilerOptions` that are normally enums */
-export interface EnumCompilerOptions {
-  module: string;
-  moduleResolution: string;
-  newLine: string;
-  jsx: string;
-  target: string;
-}
+import { PartialCompilerOptions } from '../../types';
+
+export { EnumCompilerOptions, JsonCompilerOptions } from '../../types';
+export { PartialCompilerOptions };
 
 /** Typescript compiler options */
 export type CompilerOptions = import('typescript').CompilerOptions;
-/** JSON representation of Typescript compiler options */
-export type JsonCompilerOptions = Omit<CompilerOptions, keyof EnumCompilerOptions> &
-  EnumCompilerOptions;
-/** Compiler options set by the plugin user. */
-export type PartialCustomOptions = Partial<CompilerOptions> | Partial<JsonCompilerOptions>;
 
-export const DEFAULT_COMPILER_OPTIONS: PartialCustomOptions = {
+export const DEFAULT_COMPILER_OPTIONS: PartialCompilerOptions = {
   module: 'esnext',
   noEmitOnError: true,
   skipLibCheck: true
diff --git a/packages/typescript/src/options/normalize.ts b/packages/typescript/src/options/normalize.ts
index 625a36ec3..f2f1e5ef7 100644
--- a/packages/typescript/src/options/normalize.ts
+++ b/packages/typescript/src/options/normalize.ts
@@ -1,7 +1,7 @@
 /* eslint-disable no-param-reassign */
 import { resolve } from 'path';
 
-import { CompilerOptions, PartialCustomOptions } from './interfaces';
+import { CompilerOptions, PartialCompilerOptions } from './interfaces';
 
 export const DIRECTORY_PROPS = ['outDir', 'declarationDir'] as const;
 
@@ -12,7 +12,7 @@ export const DIRECTORY_PROPS = ['outDir', 'declarationDir'] as const;
  * @param compilerOptions Compiler options to _mutate_.
  * @param relativeTo Paths are resolved relative to this path.
  */
-export function makePathsAbsolute(compilerOptions: PartialCustomOptions, relativeTo: string) {
+export function makePathsAbsolute(compilerOptions: PartialCompilerOptions, relativeTo: string) {
   for (const pathProp of DIRECTORY_PROPS) {
     if (compilerOptions[pathProp]) {
       compilerOptions[pathProp] = resolve(relativeTo, compilerOptions[pathProp] as string);
diff --git a/packages/typescript/src/options/plugin.ts b/packages/typescript/src/options/plugin.ts
index 6af361596..c28c54d92 100644
--- a/packages/typescript/src/options/plugin.ts
+++ b/packages/typescript/src/options/plugin.ts
@@ -1,11 +1,9 @@
 import { createFilter } from '@rollup/pluginutils';
 import * as defaultTs from 'typescript';
 
-import { RollupTypescriptOptions } from '../../types';
+import { RollupTypescriptOptions, PartialCompilerOptions } from '../../types';
 import getTsLibPath from '../tslib';
 
-import { PartialCustomOptions } from './interfaces';
-
 /**
  * Separate the Rollup plugin options from the Typescript compiler options,
  * and normalize the Rollup options.
@@ -24,7 +22,7 @@ export default function getPluginOptions(options: RollupTypescriptOptions) {
   return {
     filter,
     tsconfig,
-    compilerOptions: compilerOptions as PartialCustomOptions,
+    compilerOptions: compilerOptions as PartialCompilerOptions,
     typescript: typescript || defaultTs,
     tslib: tslib || getTsLibPath()
   };
diff --git a/packages/typescript/src/options/tsconfig.ts b/packages/typescript/src/options/tsconfig.ts
index 2c2ba511d..638b54473 100644
--- a/packages/typescript/src/options/tsconfig.ts
+++ b/packages/typescript/src/options/tsconfig.ts
@@ -11,7 +11,7 @@ import {
   DEFAULT_COMPILER_OPTIONS,
   EnumCompilerOptions,
   FORCED_COMPILER_OPTIONS,
-  PartialCustomOptions
+  PartialCompilerOptions
 } from './interfaces';
 import { normalizeCompilerOptions, makePathsAbsolute } from './normalize';
 
@@ -59,9 +59,9 @@ function readTsConfigFile(ts: typeof import('typescript'), tsConfigPath: string)
  * This indicates that the internal CompilerOptions type is used rather than the JsonCompilerOptions.
  */
 function containsEnumOptions(
-  compilerOptions: PartialCustomOptions
+  compilerOptions: PartialCompilerOptions
 ): compilerOptions is Partial<CompilerOptions> {
-  const enums: Array<keyof EnumCompilerOptions> = [
+  const enums: Array<EnumCompilerOptions> = [
     'module',
     'target',
     'jsx',
@@ -89,7 +89,7 @@ const configCache = new Map() as import('typescript').Map<
 export function parseTypescriptConfig(
   ts: typeof import('typescript'),
   tsconfig: RollupTypescriptOptions['tsconfig'],
-  compilerOptions: PartialCustomOptions
+  compilerOptions: PartialCompilerOptions
 ) {
   /* eslint-disable no-undefined */
   const cwd = process.cwd();
diff --git a/packages/typescript/types/index.d.ts b/packages/typescript/types/index.d.ts
index 76050f291..adffe1e71 100644
--- a/packages/typescript/types/index.d.ts
+++ b/packages/typescript/types/index.d.ts
@@ -1,19 +1,8 @@
 import { FilterPattern } from '@rollup/pluginutils';
 import { Plugin } from 'rollup';
-import { CompilerOptionsValue, TsConfigSourceFile } from 'typescript';
-
-export interface RollupTypescriptOptions {
-  /**
-   * Other Typescript compiler options.
-   */
-  [option: string]:
-    | CompilerOptionsValue
-    | TsConfigSourceFile
-    | RollupTypescriptOptions['include']
-    | RollupTypescriptOptions['typescript']
-    | RollupTypescriptOptions['tslib']
-    | undefined;
+import { CompilerOptions } from 'typescript';
 
+export interface RollupTypescriptPluginOptions {
   /**
    * Determine which files are transpiled by Typescript (all `.ts` and
    * `.tsx` files by default).
@@ -40,6 +29,18 @@ export interface RollupTypescriptOptions {
   tslib?: Promise<string> | string;
 }
 
+/** Properties of `CompilerOptions` that are normally enums */
+export type EnumCompilerOptions = 'module' | 'moduleResolution' | 'newLine' | 'jsx' | 'target';
+
+/** JSON representation of Typescript compiler options */
+export type JsonCompilerOptions = Omit<CompilerOptions, EnumCompilerOptions> &
+  Record<EnumCompilerOptions, string>;
+
+/** Compiler options set by the plugin user. */
+export type PartialCompilerOptions = Partial<CompilerOptions> | Partial<JsonCompilerOptions>;
+
+export type RollupTypescriptOptions = RollupTypescriptPluginOptions & PartialCompilerOptions;
+
 /**
  * Seamless integration between Rollup and Typescript.
  */