diff --git a/CHANGELOG.md b/CHANGELOG.md
index 32666185..108ed5db 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,7 @@
 ## Next Release
 
 * Your contribution here.
+* [#221](https://github.com/intridea/hashie/pull/221): Reduce amount of allocated objects on calls with suffixes in Hashie::Mash - [@kubum](https://github.com/kubum).
 
 ## 3.3.1 (8/26/2014)
 
diff --git a/lib/hashie/mash.rb b/lib/hashie/mash.rb
index 182fddb9..b7ad40b4 100644
--- a/lib/hashie/mash.rb
+++ b/lib/hashie/mash.rb
@@ -58,6 +58,7 @@ class Mash < Hash
     include Hashie::Extensions::PrettyInspect
 
     ALLOWED_SUFFIXES = %w(? ! = _)
+    SUFFIXES_PARSER  = /(.*?)([#{ALLOWED_SUFFIXES.join}]?)$/
 
     def self.load(path, options = {})
       @_mashes ||= new do |h, file_path|
@@ -251,8 +252,7 @@ def method_missing(method_name, *args, &blk)
     protected
 
     def method_suffix(method_name)
-      suffixes_regex = ALLOWED_SUFFIXES.join
-      match = method_name.to_s.match(/(.*?)([#{suffixes_regex}]?)$/)
+      match = method_name.to_s.match(SUFFIXES_PARSER)
       [match[1], match[2]]
     end