diff --git a/README.md b/README.md
index 65adcf94a4..f9c47a3540 100644
--- a/README.md
+++ b/README.md
@@ -85,7 +85,7 @@ source map to `script-compiled.js.map`.
 Compile the file `script.js` and output it to `script-compiled.js` with a source
 map embedded in a comment at the bottom.
 
-    $ 6to5 script.js --source-maps-comment --out-file script-compiled.js
+    $ 6to5 script.js --source-maps-inline --out-file script-compiled.js
 
 Compile the entire `src` directory and output it to the `lib` directory.
 
@@ -133,7 +133,7 @@ to5.transformFile("filename.js", options, function (err, result) {
   whitelist: [],
 
   // If truthy, adds a `map` property to returned output.
-  // If set to "comment", the sourceMappingURL directive is added at the bottom
+  // If set to "inline", a comment with a sourceMappingURL directive is added to the bottom
   sourceMap: false,
 
   // Filename for use in errors etc.
diff --git a/bin/6to5 b/bin/6to5
index 095ce1de96..de3da0f239 100755
--- a/bin/6to5
+++ b/bin/6to5
@@ -9,7 +9,7 @@ var to5       = require("../lib/6to5/node");
 var fs        = require("fs");
 var _         = require("lodash");
 
-commander.option("-t, --source-map-type [type]", "Specify a custom sourcemap type such as `comment`");
+commander.option("-t, --source-maps-inline", "Append sourceMappingURL comment to bottom of code");
 commander.option("-s, --source-maps", "Save source map alongside the compiled code when using --out-file and --out-dir flags");
 //commander.option("-w, --watch", "Watch, only works with --out-dir");
 
@@ -58,10 +58,14 @@ var readdirFilter = function (filename) {
 var mainOpts = {
   blacklist: commander.blacklist,
   whitelist: commander.whitelist,
-  sourceMap: commander.sourceMapType || commander.sourceMaps,
+  sourceMap: commander.sourceMaps,
   tolerant:  commander.tolerant
 };
 
+if (commander.sourceMapsInline) {
+  mainOpts.sourceMap = "inline";
+}
+
 var data = [];
 
 var compile = function (filename) {
@@ -81,7 +85,7 @@ if (commander.outDir) {
     var up = path.normalize(dest + "/..");
     mkdirp.sync(up);
 
-    if (commander.sourceMaps && !commander.sourceMapType) {
+    if (commander.sourceMaps) {
       fs.writeFileSync(dest + ".map", data.map.toJSON());
     }
 
diff --git a/lib/6to5/transform.js b/lib/6to5/transform.js
index b25c48fb00..4551c97844 100644
--- a/lib/6to5/transform.js
+++ b/lib/6to5/transform.js
@@ -54,7 +54,7 @@ transform._run = function (code, tree, opts) {
   var result = util.generate(tree, genOpts);
 
   if (opts.sourceMap) {
-    if (opts.sourceMap === "comment") {
+    if (opts.sourceMap === "inline") {
       result.code += "\n" + util.sourceMapToComment(result.map);
     }
 
diff --git a/package.json b/package.json
index 136bb0ad8e..14b5b9ae48 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "6to5",
   "description": "Turn ES6 code into vanilla ES5 with source maps and no runtime",
-  "version": "1.2.0",
+  "version": "1.3.0",
   "author": "Sebastian McKenzie <sebmck@gmail.com>",
   "homepage": "https://github.com/sebmck/6to5",
   "repository": {