diff --git a/guides/source/asset_pipeline.md b/guides/source/asset_pipeline.md
index 43df544e28ae33e3cda401dbe836238ce8779eb1..bc4b49dd38a22d821a4fc809520a65d65b6267c5 100644
--- a/guides/source/asset_pipeline.md
+++ b/guides/source/asset_pipeline.md
@@ -416,7 +416,7 @@ You can call this task on the server during deployment to create compiled versio
 The rake task is:
 
 ```bash
-$ bundle exec rake assets:precompile
+$ RAILS_ENV=production bundle exec rake assets:precompile
 ```
 
 For faster asset precompiles, you can partially load your application by setting