diff --git a/dist/normalize.d.ts b/dist/normalize.d.ts
deleted file mode 100644
index 4b1e02cb..00000000
--- a/dist/normalize.d.ts
+++ /dev/null
@@ -1,2 +0,0 @@
-export declare function normalize(fileName: string): string;
-//# sourceMappingURL=normalize.d.ts.map
\ No newline at end of file
diff --git a/dist/normalize.d.ts.map b/dist/normalize.d.ts.map
deleted file mode 100644
index f3859f10..00000000
--- a/dist/normalize.d.ts.map
+++ /dev/null
@@ -1 +0,0 @@
-{"version":3,"file":"normalize.d.ts","sourceRoot":"","sources":["../src/normalize.ts"],"names":[],"mappings":"AAAA,wBAAgB,SAAS,CAAC,QAAQ,EAAE,MAAM,UAGzC"}
\ No newline at end of file
diff --git a/src/host.ts b/src/host.ts
index 13cba565..0ee68e19 100644
--- a/src/host.ts
+++ b/src/host.ts
@@ -1,7 +1,7 @@
 import { tsModule } from "./tsproxy";
 import * as tsTypes from "typescript";
 import * as _ from "lodash";
-import { normalize } from "./normalize";
+import { normalizePath as normalize } from "@rollup/pluginutils";
 import { TransformerFactoryCreator } from "./ioptions";
 
 export class LanguageServiceHost implements tsTypes.LanguageServiceHost
diff --git a/src/index.ts b/src/index.ts
index 2c5c8e35..433d9771 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -13,7 +13,7 @@ import { printDiagnostics } from "./print-diagnostics";
 import { TSLIB, TSLIB_VIRTUAL, tslibSource, tslibVersion } from "./tslib";
 import { blue, red, yellow, green } from "colors/safe";
 import { relative, dirname, normalize as pathNormalize, resolve as pathResolve } from "path";
-import { normalize } from "./normalize";
+import { normalizePath as normalize } from "@rollup/pluginutils";
 import findCacheDir from "find-cache-dir";
 
 import { PluginImpl, PluginContext, InputOptions, OutputOptions, TransformResult, SourceMap, Plugin } from "rollup";
diff --git a/src/normalize.ts b/src/normalize.ts
deleted file mode 100644
index 80ce354f..00000000
--- a/src/normalize.ts
+++ /dev/null
@@ -1,4 +0,0 @@
-export function normalize(fileName: string)
-{
-	return fileName.split("\\").join("/");
-}