diff --git a/CHANGELOG.md b/CHANGELOG.md
index 497ca1d47..bff47d2e9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,8 @@
 # Changelog
 
+## 5.1.1
+* [fix(getTranspilationEmit): pass the raw path to transpileModule](https://github.com/TypeStrong/ts-loader/pull/835) - thanks @Brooooooklyn 
+
 ## 5.1.0
 
 * [feat: Added cache for some FS operations while compiling - `experimentalFileCaching`](https://github.com/TypeStrong/ts-loader/pull/829) - thanks @timocov!
diff --git a/package.json b/package.json
index 14b64d529..efc41307e 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "ts-loader",
-  "version": "5.1.0",
+  "version": "5.1.1",
   "description": "TypeScript loader for webpack",
   "main": "index.js",
   "types": "dist/types/index.d.ts",
diff --git a/src/index.ts b/src/index.ts
index d6b57d787..68d6838b5 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -336,13 +336,11 @@ function getEmit(
  * Transpile file
  */
 function getTranspilationEmit(
-  filePath: string,
+  fileName: string,
   contents: string,
   instance: TSInstance,
   loader: Webpack
 ) {
-  const fileName = path.basename(filePath);
-
   const {
     outputText,
     sourceMapText,