diff --git a/guides/source/i18n.md b/guides/source/i18n.md
index 25d85288d4..2468853947 100644
--- a/guides/source/i18n.md
+++ b/guides/source/i18n.md
@@ -1145,7 +1145,7 @@ In other contexts you might want to change this behavior, though. E.g. the defau
 module I18n
   class JustRaiseExceptionHandler < ExceptionHandler
     def call(exception, locale, key, options)
-      if exception.is_a?(MissingTranslationData)
+      if exception.is_a?(MissingTranslation)
         raise exception.to_exception
       else
         super
@@ -1162,7 +1162,7 @@ This would re-raise only the `MissingTranslationData` exception, passing all oth
 However, if you are using `I18n::Backend::Pluralization` this handler will also raise `I18n::MissingTranslationData: translation missing: en.i18n.plural.rule` exception that should normally be ignored to fall back to the default pluralization rule for English locale. To avoid this you may use additional check for translation key:
 
 ```ruby
-if exception.is_a?(MissingTranslationData) && key.to_s != 'i18n.plural.rule'
+if exception.is_a?(MissingTranslation) && key.to_s != 'i18n.plural.rule'
   raise exception.to_exception
 else
   super