diff --git a/build/test.js b/build/test.js
index 7f7aead9..010c42b9 100644
--- a/build/test.js
+++ b/build/test.js
@@ -45,7 +45,7 @@ assert.equal('application/font-woff', mime.lookup('file.woff'));
 assert.equal('application/octet-stream', mime.lookup('file.buffer'));
 // TODO: Uncomment once #157 is resolved
 // assert.equal('audio/mp4', mime.lookup('file.m4a'));
-assert.equal('font/opentype', mime.lookup('file.otf'));
+assert.equal('font/otf', mime.lookup('file.otf'));
 
 //
 // Test charsets
diff --git a/mime.js b/mime.js
index d9a46a84..d7efbde7 100644
--- a/mime.js
+++ b/mime.js
@@ -67,7 +67,7 @@ Mime.prototype.load = function(file) {
  * Lookup a mime type based on extension
  */
 Mime.prototype.lookup = function(path, fallback) {
-  var ext = path.replace(/.*[\.\/\\]/, '').toLowerCase();
+  var ext = path.replace(/^.*[\.\/\\]/, '').toLowerCase();
 
   return this.types[ext] || fallback || this.default_type;
 };