diff --git a/package.json b/package.json
index d69155a9..e31a97bf 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "babel-loader",
-  "version": "8.2.4",
+  "version": "8.2.5",
   "description": "babel module loader for webpack",
   "files": [
     "lib"
diff --git a/src/index.js b/src/index.js
index 45f518da..41d4d46b 100644
--- a/src/index.js
+++ b/src/index.js
@@ -130,7 +130,7 @@ async function loader(source, inputSourceMap, overrides) {
 
   const programmaticOptions = Object.assign({}, loaderOptions, {
     filename,
-    inputSourceMap: inputSourceMap || undefined,
+    inputSourceMap: inputSourceMap || loaderOptions.inputSourceMap,
 
     // Set the default sourcemap behavior based on Webpack's mapping flag,
     // but allow users to override if they want.