diff --git a/lib/unicode_normalize.rb b/lib/unicode_normalize.rb
index cf99a13572..e87677eb68 100644
--- a/lib/unicode_normalize.rb
+++ b/lib/unicode_normalize.rb
@@ -42,8 +42,7 @@ class String
   #
   def unicode_normalize!(form = :nfc)
     require 'unicode_normalize/normalize.rb' unless defined? UnicodeNormalize
-    # String.send(:define_method, :unicode_normalize!, ->(form = :nfc) { replace(unicode_normalize(form)) } )
-    replace(unicode_normalize(form))
+    unicode_normalize! form
   end
 
   # :call-seq:
@@ -65,8 +64,7 @@ class String
   #
   def unicode_normalized?(form = :nfc)
     require 'unicode_normalize/normalize.rb' unless defined? UnicodeNormalize
-    # String.send(:define_method, :unicode_normalized?, ->(form = :nfc) { UnicodeNormalize.normalized?(self, form) } )
-    UnicodeNormalize.normalized?(self, form)
+    unicode_normalized? form
   end
 end
 
diff --git a/lib/unicode_normalize/normalize.rb b/lib/unicode_normalize/normalize.rb
index 759197d02c..87b84589a5 100644
--- a/lib/unicode_normalize/normalize.rb
+++ b/lib/unicode_normalize/normalize.rb
@@ -157,11 +157,18 @@ module UnicodeNormalize  # :nodoc:
       raise Encoding::CompatibilityError, "Unicode Normalization not appropriate for #{encoding}"
     end
   end
-
 end # module
 
 class String  # :nodoc:
   def unicode_normalize(form = :nfc)
     UnicodeNormalize.normalize(self, form)
   end
+
+  def unicode_normalize!(form = :nfc)
+    replace(UnicodeNormalize.normalize(self, form))
+  end
+
+  def unicode_normalized?(form = :nfc)
+    UnicodeNormalize.normalized?(self, form)
+  end
 end