diff --git a/lib/vagrant/util/downloader.rb b/lib/vagrant/util/downloader.rb
index ccf483b94..2db2c56c7 100644
--- a/lib/vagrant/util/downloader.rb
+++ b/lib/vagrant/util/downloader.rb
@@ -9,6 +9,10 @@ module Vagrant
     # to cURL. cURL is a much more capable and complete download tool than
     # a hand-rolled Ruby library, so we defer to it's expertise.
     class Downloader
+      # Custom user agent provided to cURL so that requests to URL shorteners
+      # are properly tracked.
+      USER_AGENT = "Vagrant cURL Downloader"
+
       def initialize(source, destination, options=nil)
         @logger      = Log4r::Logger.new("vagrant::util::downloader")
         @source      = source.to_s
@@ -32,6 +36,7 @@ module Vagrant
           "--fail",
           "--location",
           "--max-redirs", "10",
+          "--user-agent", USER_AGENT,
           "--output", @destination
         ]
 
diff --git a/test/unit/vagrant/util/downloader_test.rb b/test/unit/vagrant/util/downloader_test.rb
index 8e45c082d..7968700b1 100644
--- a/test/unit/vagrant/util/downloader_test.rb
+++ b/test/unit/vagrant/util/downloader_test.rb
@@ -25,7 +25,7 @@ describe Vagrant::Util::Downloader do
       let(:exit_code) { 0 }
 
       it "downloads the file and returns true" do
-        curl_options = ["--fail", "--location", "--max-redirs", "10", "--output", destination, source, {}]
+        curl_options = ["--fail", "--location", "--max-redirs", "10", "--user-agent", described_class::USER_AGENT, "--output", destination, source, {}]
 
         Vagrant::Util::Subprocess.should_receive(:execute).
           with("curl", *curl_options).
@@ -39,7 +39,7 @@ describe Vagrant::Util::Downloader do
       let(:exit_code) { 1 }
 
       it "raises an exception" do
-        curl_options = ["--fail", "--location", "--max-redirs", "10", "--output", destination, source, {}]
+        curl_options = ["--fail", "--location", "--max-redirs", "10", "--user-agent", described_class::USER_AGENT, "--output", destination, source, {}]
 
         Vagrant::Util::Subprocess.should_receive(:execute).
           with("curl", *curl_options).