diff --git a/config/environments/development.rb b/config/environments/development.rb
index f7152f887fd..c95905ae3ad 100644
--- a/config/environments/development.rb
+++ b/config/environments/development.rb
@@ -22,8 +22,9 @@ Discourse::Application.configure do
   # Do not compress assets
   config.assets.compress = false
 
-  # Expands the lines which load the assets
-  config.assets.debug = true
+  # Concatenate all assets, even in development mode. This appears to be considerably
+  # faster for reloading in development mode.
+  config.assets.debug = false
 
   config.watchable_dirs['lib'] = [:rb]