diff --git a/lib/unsupported-api.js b/lib/unsupported-api.js
index b688608ca88..8a2e147aabe 100644
--- a/lib/unsupported-api.js
+++ b/lib/unsupported-api.js
@@ -14,6 +14,7 @@
 const { FileEnumerator } = require("./cli-engine/file-enumerator");
 const { FlatESLint, shouldUseFlatConfig } = require("./eslint/flat-eslint");
 const FlatRuleTester = require("./rule-tester/flat-rule-tester");
+const { ESLint } = require("./eslint/eslint");
 
 //-----------------------------------------------------------------------------
 // Exports
@@ -24,5 +25,6 @@ module.exports = {
     FlatESLint,
     shouldUseFlatConfig,
     FlatRuleTester,
-    FileEnumerator
+    FileEnumerator,
+    LegacyESLint: ESLint
 };
diff --git a/tests/lib/unsupported-api.js b/tests/lib/unsupported-api.js
index 3a65ba230f8..4ad46c3d217 100644
--- a/tests/lib/unsupported-api.js
+++ b/tests/lib/unsupported-api.js
@@ -27,6 +27,14 @@ describe("unsupported-api", () => {
         assert.isFunction(api.FlatESLint);
     });
 
+    it("should have LegacyESLint exposed", () => {
+        assert.isFunction(api.LegacyESLint);
+    });
+
+    it("should not have ESLint exposed", () => {
+        assert.isUndefined(api.ESLint);
+    });
+
     it("should have shouldUseFlatConfig exposed", () => {
         assert.isFunction(api.shouldUseFlatConfig);
     });