diff --git a/cli/index.d.ts b/cli/index.d.ts
index 16e070529e..58c7fb4ef6 100644
--- a/cli/index.d.ts
+++ b/cli/index.d.ts
@@ -240,7 +240,8 @@ export function createMemoryStream(fn?: (chunk: Uint8Array | string) => void): M
 /** Compatible TypeScript compiler options for syntax highlighting etc. */
 export const tscOptions: Record<string,unknown>;
 
-import { Program, Parser, Module } from "../src";
+import binaryen from "../lib/binaryen";
+import { Program, Parser } from "../src";
 
 /** Compiler transform base class. */
 export abstract class Transform {
@@ -248,6 +249,9 @@ export abstract class Transform {
   /** Program reference. */
   readonly program: Program;
 
+  /** Binaryen reference. */
+  readonly binaryen: typeof binaryen;
+
   /** Base directory. */
   readonly baseDir: string;
 
@@ -276,5 +280,5 @@ export abstract class Transform {
   afterInitialize?(program: Program): void | Promise<void>;
 
   /** Called when compilation is complete, before the module is being validated. */
-  afterCompile?(module: Module): void | Promise<void>;
+  afterCompile?(module: binaryen.Module): void | Promise<void>;
 }
diff --git a/cli/index.js b/cli/index.js
index 91634a8c01..b7b4a836e5 100644
--- a/cli/index.js
+++ b/cli/index.js
@@ -450,6 +450,7 @@ export async function main(argv, options) {
       if (typeof transform === "function") {
         Object.assign(transform.prototype, {
           program,
+          binaryen,
           baseDir,
           stdout,
           stderr,
diff --git a/scripts/build-dts.js b/scripts/build-dts.js
index 07215c9be9..0493075824 100644
--- a/scripts/build-dts.js
+++ b/scripts/build-dts.js
@@ -373,9 +373,13 @@ export function generateCli() {
     prefix,
     stdout,
     resolveModuleImport: ({ importedModuleId, currentModuleId }) => {
-      return currentModuleId == "cli/index" && importedModuleId == "../src"
-        ? prefix + "/src/index"
-        : null;
+      if (currentModuleId == "cli/index" && importedModuleId == "../src")
+        return prefix + "/src/index";
+
+      if (importedModuleId == "binaryen")
+        return "binaryen";
+
+      return null;
     },
   });