diff --git a/lib/redmine/core_ext/string.rb b/lib/redmine/core_ext/string.rb
index 54cf62973..443b8fc39 100644
--- a/lib/redmine/core_ext/string.rb
+++ b/lib/redmine/core_ext/string.rb
@@ -5,6 +5,6 @@ require File.dirname(__FILE__) + '/string/inflections'
 
 # @private
 class String
-  include Redmine::CoreExtensions::String::Conversions
-  include Redmine::CoreExtensions::String::Inflections
+  include Redmine::CoreExt::String::Conversions
+  include Redmine::CoreExt::String::Inflections
 end
diff --git a/lib/redmine/core_ext/string/conversions.rb b/lib/redmine/core_ext/string/conversions.rb
index 1cf7dcbf1..9518df2a2 100644
--- a/lib/redmine/core_ext/string/conversions.rb
+++ b/lib/redmine/core_ext/string/conversions.rb
@@ -19,7 +19,7 @@
 
 module Redmine
   # @private
-  module CoreExtensions
+  module CoreExt
     # @private
     module String
       # Custom string conversions
diff --git a/lib/redmine/core_ext/string/inflections.rb b/lib/redmine/core_ext/string/inflections.rb
index 999236f94..093dd9b39 100644
--- a/lib/redmine/core_ext/string/inflections.rb
+++ b/lib/redmine/core_ext/string/inflections.rb
@@ -19,7 +19,7 @@
 
 module Redmine
   # @private
-  module CoreExtensions
+  module CoreExt
     # @private
     module String
       # Custom string inflections