diff --git a/lib/processors/minifier.js b/lib/processors/minifier.js
index 2b6f2ea45..ba13aa656 100644
--- a/lib/processors/minifier.js
+++ b/lib/processors/minifier.js
@@ -72,7 +72,7 @@ module.exports = async function({resources, fs}) {
 				},
 				sourceMap: {
 					filename,
-					url: resource.getPath() + ".map"
+					url: filename + ".map"
 				}
 			});
 			resource.setString(result.code);