diff --git a/guides/source/active_support_core_extensions.md b/guides/source/active_support_core_extensions.md
index ca023f7f66fef9c9ddc62b61a7a2c8fe866b12ea..a08d2d2392c9852bfc082afc9b24425b4c159911 100644
--- a/guides/source/active_support_core_extensions.md
+++ b/guides/source/active_support_core_extensions.md
@@ -420,7 +420,7 @@ NOTE: Defined in `active_support/core_ext/object/with_options.rb`.
 
 ### JSON support
 
-Active Support provides a better implemention of `to_json` than the +json+ gem ordinarily provides for Ruby objects. This is because some classes, like +Hash+ and +OrderedHash+ needs special handling in order to provide a proper JSON representation.
+Active Support provides a better implementation of `to_json` than the +json+ gem ordinarily provides for Ruby objects. This is because some classes, like +Hash+ and +OrderedHash+ needs special handling in order to provide a proper JSON representation.
 
 Active Support also provides an implementation of `as_json` for the <tt>Process::Status</tt> class.