diff --git a/index.js b/index.js
index a0ae444..bbf7fa8 100644
--- a/index.js
+++ b/index.js
@@ -24,7 +24,7 @@ module.exports = function (txt, opt) {
       return;
     var offset = +parts[0];
     var file = parts[1];
-    var line = ++parts[2];
+    var line = +parts[2];
 
     map.addMapping({
       generated: {
diff --git a/package.json b/package.json
index 6a82e6b..2df3e9d 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "txt2map4wasm",
-  "version": "1.0.2",
+  "version": "1.0.3",
   "description": "Translates wasm text source map to JSON map",
   "main": "index.js",
   "scripts": {