diff --git a/Library/Homebrew/test/test_versions.rb b/Library/Homebrew/test/test_versions.rb
index 49f6b9a1db..e1566b50e6 100644
--- a/Library/Homebrew/test/test_versions.rb
+++ b/Library/Homebrew/test/test_versions.rb
@@ -235,6 +235,10 @@ class VersionParsingTests < Test::Unit::TestCase
     assert_version_detected '3.4', 'http://www.antlr.org/download/antlr-3.4-complete.jar'
   end
 
+  def test_jenkins_version_style
+    assert_version_detected '1.486', 'http://mirrors.jenkins-ci.org/war/1.486/jenkins.war'
+  end
+
   # def test_version_ghc_style
   #   assert_version_detected '7.0.4', 'http://www.haskell.org/ghc/dist/7.0.4/ghc-7.0.4-x86_64-apple-darwin.tar.bz2'
   #   assert_version_detected '7.0.4', 'http://www.haskell.org/ghc/dist/7.0.4/ghc-7.0.4-i386-apple-darwin.tar.bz2'
diff --git a/Library/Homebrew/version.rb b/Library/Homebrew/version.rb
index 9e2fd32ae0..be1ee63c2e 100644
--- a/Library/Homebrew/version.rb
+++ b/Library/Homebrew/version.rb
@@ -175,6 +175,10 @@ class Version
     # e.g. astyle_1.23_macosx.tar.gz
     m = /_([^_]+)/.match(stem)
     return m.captures.first unless m.nil?
+
+    # e.g. http://mirrors.jenkins-ci.org/war/1.486/jenkins.war
+    m = /\/(\d\.\d+)\//.match(spec.to_s)
+    return m.captures.first unless m.nil?
   end
 
   # DSL for defining comparators