diff --git a/activesupport/lib/active_support/cache/redis_cache_store.rb b/activesupport/lib/active_support/cache/redis_cache_store.rb
index a134bb7095..a1cb6db25d 100644
--- a/activesupport/lib/active_support/cache/redis_cache_store.rb
+++ b/activesupport/lib/active_support/cache/redis_cache_store.rb
@@ -154,7 +154,7 @@ module ActiveSupport
       #   :url   Array  -> Redis::Distributed.new([{ url: … }, { url: … }, …])
       #
       # No namespace is set by default. Provide one if the Redis cache
-      # server is shared with other apps: <tt>namespace: 'myapp-cache'<tt>.
+      # server is shared with other apps: <tt>namespace: 'myapp-cache'</tt>.
       #
       # Compression is enabled by default with a 1kB threshold, so cached
       # values larger than 1kB are automatically compressed. Disable by