diff --git a/Library/Homebrew/bottle_version.rb b/Library/Homebrew/bottle_version.rb
index 38b51005eb..615980d839 100644
--- a/Library/Homebrew/bottle_version.rb
+++ b/Library/Homebrew/bottle_version.rb
@@ -7,6 +7,10 @@ class BottleVersion < Version
     m = /-([\d\.]+-x86(_64)?)/.match(stem)
     return m.captures.first unless m.nil?
 
+    # e.g. x264-r2197.4.mavericks.bottle.tar.gz
+    m = /(r\d+\.\d)/.match(stem)
+    return m.captures.first unless m.nil?
+
     # e.g. ssh-copy-id-6.2p2.mountain_lion.bottle.tar.gz
     # e.g. icu4c-52.1.mountain_lion.bottle.tar.gz
     m = /(\d+\.(\d)+(p(\d)+)?)/.match(stem)
diff --git a/Library/Homebrew/test/test_bottle_versions.rb b/Library/Homebrew/test/test_bottle_versions.rb
index 26efb1261d..7968d1e19e 100644
--- a/Library/Homebrew/test/test_bottle_versions.rb
+++ b/Library/Homebrew/test/test_bottle_versions.rb
@@ -20,4 +20,9 @@ class BottleVersionParsingTests < Test::Unit::TestCase
     assert_version_detected '52.1',
       '/usr/local/icu4c-52.1.mavericks.bottle.tar.gz'
   end
+
+  def test_x264_style
+    assert_version_detected 'r2197.4',
+      '/usr/local/x264-r2197.4.mavericks.bottle.tar.gz'
+  end
 end