diff --git a/activesupport/lib/active_support/core_ext/string.rb b/activesupport/lib/active_support/core_ext/string.rb
index 411ea0f016893..d8d1f9436e8b8 100644
--- a/activesupport/lib/active_support/core_ext/string.rb
+++ b/activesupport/lib/active_support/core_ext/string.rb
@@ -9,3 +9,4 @@
 require 'active_support/core_ext/string/interpolation'
 require 'active_support/core_ext/string/output_safety'
 require 'active_support/core_ext/string/exclude'
+require 'active_support/core_ext/string/encoding'
\ No newline at end of file