diff --git a/Library/Homebrew/extend/string.rb b/Library/Homebrew/extend/string.rb
index b2a247297b..7fe47d38e4 100644
--- a/Library/Homebrew/extend/string.rb
+++ b/Library/Homebrew/extend/string.rb
@@ -24,6 +24,15 @@ class String
     end
   end unless method_defined?(:start_with?)
 
+  def end_with?(*suffixes)
+    suffixes.any? do |suffix|
+      if suffix.respond_to?(:to_str)
+        suffix = suffix.to_str
+        self[-suffix.length, suffix.length] == suffix
+      end
+    end
+  end unless method_defined?(:end_with?)
+
   # String.chomp, but if result is empty: returns nil instead.
   # Allows `chuzzle || foo` short-circuits.
   def chuzzle