diff --git a/config/environments/development.rb b/config/environments/development.rb
index c3b67c6bb1..600d08d2f7 100644
--- a/config/environments/development.rb
+++ b/config/environments/development.rb
@@ -31,7 +31,7 @@ Rails.application.configure do
 
   # Enable/disable caching. By default caching is disabled.
   # Run rails dev:cache to toggle caching.
-  if Rails.root.join("tmp/caching-dev.txt").exist? || !ENV["PROFILE"] || !!ENV["DEV_CACHING"]
+  if Rails.root.join("tmp/caching-dev.txt").exist? || !!ENV["PROFILE"] || !!ENV["DEV_CACHING"]
     config.action_controller.perform_caching = true
     config.action_controller.enable_fragment_cache_logging = true