diff --git a/packages/babel-cli/src/babel/file.js b/packages/babel-cli/src/babel/file.js
index 7784979ca4..9bf50f6759 100644
--- a/packages/babel-cli/src/babel/file.js
+++ b/packages/babel-cli/src/babel/file.js
@@ -16,7 +16,7 @@ module.exports = function (commander, filenames, opts) {
 
   let buildResult = function () {
     let map = new sourceMap.SourceMapGenerator({
-      file: path.basename(commander.outFile) || "stdout",
+      file: path.basename(commander.outFile || "") || "stdout",
       sourceRoot: opts.sourceRoot
     });
 
diff --git a/packages/babel-core/src/transformation/file/options/option-manager.js b/packages/babel-core/src/transformation/file/options/option-manager.js
index 3739fa6aa7..4a5f025138 100644
--- a/packages/babel-core/src/transformation/file/options/option-manager.js
+++ b/packages/babel-core/src/transformation/file/options/option-manager.js
@@ -309,7 +309,7 @@ export default class OptionManager {
         options: presetOpts,
         alias: presetLoc,
         loc: presetLoc,
-        dirname: path.dirname(presetLoc)
+        dirname: path.dirname(presetLoc || "")
       });
     });
   }