diff --git a/lib/output.js b/lib/output.js
index 3b1f9664..eec9dd0a 100644
--- a/lib/output.js
+++ b/lib/output.js
@@ -274,6 +274,7 @@ function toFormat (format, options) {
   if (is.object(format) && is.string(format.id)) {
     format = format.id;
   }
+  if (format === 'jpg') format = 'jpeg';
   if (!is.inArray(format, ['jpeg', 'png', 'webp', 'tiff', 'raw'])) {
     throw new Error('Unsupported output format ' + format);
   }
diff --git a/test/unit/io.js b/test/unit/io.js
index 07889a2b..64a1054f 100644
--- a/test/unit/io.js
+++ b/test/unit/io.js
@@ -253,6 +253,21 @@ describe('Input/output', function () {
       });
   });
 
+  it('Support output to jpg format', function (done) {
+    sharp(fixtures.inputPng)
+      .resize(320, 240)
+      .toFormat('jpg')
+      .toBuffer(function (err, data, info) {
+        if (err) throw err;
+        assert.strictEqual(true, data.length > 0);
+        assert.strictEqual(data.length, info.size);
+        assert.strictEqual('jpeg', info.format);
+        assert.strictEqual(320, info.width);
+        assert.strictEqual(240, info.height);
+        done();
+      });
+  });
+
   it('Fail when output File is input File', function (done) {
     sharp(fixtures.inputJpg).toFile(fixtures.inputJpg, function (err) {
       assert(!!err);