2 files changed, 2 insertions, 2 deletions
diff --git a/Library/Homebrew/cmd/tap.rb b/Library/Homebrew/cmd/tap.rb
index d13921572..3fb5ca65c 100644
--- a/Library/Homebrew/cmd/tap.rb
+++ b/Library/Homebrew/cmd/tap.rb
@@ -123,7 +123,7 @@ module Homebrew
     case path.to_s
     when HOMEBREW_TAP_PATH_REGEX
       "#$1/#$2/#{File.basename($3, '.rb')}"
-    when %r{^#{HOMEBREW_LIBRARY}/Formula/(.+)}
+    when %r{^#{Regexp.escape(HOMEBREW_LIBRARY.to_s)}/Formula/(.+)}o
       "Homebrew/homebrew/#{File.basename($1, '.rb')}"
     else
       nil
diff --git a/Library/Homebrew/cmd/update.rb b/Library/Homebrew/cmd/update.rb
index 7bced13a9..b1ee8d8fe 100644
--- a/Library/Homebrew/cmd/update.rb
+++ b/Library/Homebrew/cmd/update.rb
@@ -266,7 +266,7 @@ class Report
   def select_formula key
     fetch(key, []).map do |path|
       case path.to_s
-      when Regexp.new(HOMEBREW_LIBRARY + "/Formula")
+      when %r{^#{Regexp.escape(HOMEBREW_LIBRARY.to_s)}/Formula}o
         path.basename(".rb").to_s
       when HOMEBREW_TAP_PATH_REGEX
         "#$1/#{$2.sub("homebrew-", "")}/#{path.basename(".rb")}"