diff --git a/__tests__/host.spec.ts b/__tests__/host.spec.ts
index 21ce7178..fbb95ded 100644
--- a/__tests__/host.spec.ts
+++ b/__tests__/host.spec.ts
@@ -2,7 +2,7 @@ import { afterAll, beforeAll, test, expect, jest } from "@jest/globals";
 import * as ts from "typescript";
 import * as path from "path";
 import { normalizePath as normalize } from "@rollup/pluginutils";
-import { remove, ensureDir, writeFile } from "fs-extra";
+import { remove, ensureDir, writeFile, ensureSymlink } from "fs-extra";
 
 import { setTypescriptModule } from "../src/tsproxy";
 import { LanguageServiceHost } from "../src/host";
@@ -18,12 +18,14 @@ const unaryFuncSnap = { text: unaryFunc };
 const local = (x: string) => normalize(path.resolve(__dirname, x));
 const testDir = local("__temp/host");
 const testFile = `${testDir}/file.ts`;
+const linkedTestFile = `${testDir}/link.ts`;
 const nonExistent = `${testDir}/this-does-not-exist.ts`;
 
 afterAll(() => remove(testDir));
 beforeAll(async () => {
 	await ensureDir(testDir);
 	await writeFile(testFile, unaryFunc, "utf8");
+	await ensureSymlink(testFile, linkedTestFile);
 });
 
 test("LanguageServiceHost", async () => {
@@ -55,10 +57,12 @@ test("LanguageServiceHost", async () => {
 	expect(host.directoryExists(nonExistent)).toBeFalsy();
 	expect(host.fileExists(nonExistent)).toBeFalsy();
 	expect(host.fileExists(testFile)).toBeTruthy();
-	expect(host.readDirectory(testDir)).toEqual([testFile]);
+	expect(host.readDirectory(testDir)).toEqual([testFile, linkedTestFile]);
 	expect(host.readFile(nonExistent)).toBeFalsy();
 	expect(host.readFile(testFile)).toEqual(unaryFunc);
 	expect(host.useCaseSensitiveFileNames()).toBe(process.platform === "linux");
+	expect(host.realpath(testFile)).toEqual(testFile);
+	expect(host.realpath(linkedTestFile)).toEqual(testFile);
 
 	// test misc functionality
 	expect(host.getCompilationSettings()).toEqual(testOpts);
diff --git a/src/host.ts b/src/host.ts
index 6c1d4c55..a0831635 100644
--- a/src/host.ts
+++ b/src/host.ts
@@ -104,6 +104,11 @@ export class LanguageServiceHost implements tsTypes.LanguageServiceHost
 		return tsModule.sys.fileExists(path);
 	}
 
+	public realpath(path: string): string
+	{
+		return tsModule.sys.realpath!(path); // this exists in the default implementation: https://github.com/microsoft/TypeScript/blob/ab2523bbe0352d4486f67b73473d2143ad64d03d/src/compiler/sys.ts#L1288
+	}
+
 	public getTypeRootsVersion(): number
 	{
 		return 0;