diff --git a/activesupport/lib/active_support/cache/memory_store.rb b/activesupport/lib/active_support/cache/memory_store.rb
index f2996a9c45..56fe1457d0 100644
--- a/activesupport/lib/active_support/cache/memory_store.rb
+++ b/activesupport/lib/active_support/cache/memory_store.rb
@@ -84,7 +84,7 @@ module ActiveSupport
         modify_value(name, -amount, options)
       end
 
-      # Deletes cache entires if the cache key matches a given pattern
+      # Deletes cache entries if the cache key matches a given pattern.
       def delete_matched(matcher, options = nil)
         options = merged_options(options)
         instrument(:delete_matched, matcher.inspect) do